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iptables : add raw table support
[pve-firewall.git] / src / PVE / Firewall.pm
CommitLineData
b6360c3f
DM		 1package PVE::Firewall;
2
3use warnings;
4use strict;
585ede43 5
09d5f68e 6use Digest::SHA;
0fd61594
TL		 7use Encode;
8use File::Basename;
9use File::Path;
10use IO::File;
11use Net::IP;
12use POSIX;
06208a01 13use Socket qw(AF_INET AF_INET6 inet_ntop inet_pton);
0fd61594
TL		 14use Storable qw(dclone);
15
16use PVE::Cluster;
06208a01 17use PVE::Corosync;
7ca36671 18use PVE::Exception qw(raise raise_param_exc);
0fd61594 19use PVE::INotify;
e74a87f5 20use PVE::JSONSchema qw(register_standard_option get_standard_option);
2e1ae6b9 21use PVE::Network;
0fd61594 22use PVE::ProcFSTools;
eedcb564 23use PVE::SafeSyslog;
0fd61594 24use PVE::Tools qw($IPV4RE $IPV6RE);
1a301a8d 25use PVE::Tools qw(run_command lock_file dir_glob_foreach);
ecbea048 26
21053409
DM		 27my $pvefw_conf_dir = "/etc/pve/firewall";
28my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
fca39c2c 29
fdefeeab 30# dynamically include PVE::QemuServer and PVE::LXC
d9fee004
DM		 31# to avoid dependency problems
32my $have_qemu_server;
33eval {
34 require PVE::QemuServer;
b5a16dd3 35 require PVE::QemuConfig;
d9fee004
DM		 36 $have_qemu_server = 1;
37};
38
3b4882dc
AG		 39my $have_lxc;
40eval {
41 require PVE::LXC;
42 $have_lxc = 1;
43};
44
259db1e6
DM		 45my $pve_fw_status_dir = "/var/lib/pve-firewall";
46
47mkdir $pve_fw_status_dir; # make sure this exists
48
351052d1
DM		 49my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
50my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
f9792937 51our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
351052d1
DM		 52
53my $max_alias_name_length = 64;
54my $max_ipset_name_length = 64;
5c53cde4 55my $max_group_name_length = 18;
351052d1 56
48e3963e
WB		 57my $PROTOCOLS_WITH_PORTS = {
58 udp => 1, 17 => 1,
59 udplite => 1, 136 => 1,
60 tcp => 1, 6 => 1,
61 dccp => 1, 33 => 1,
62 sctp => 1, 132 => 1,
63};
64
ae029a88
DM		 65PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
66sub pve_verify_ip_or_cidr {
009ee3ac
DM		 67 my ($cidr, $noerr) = @_;
68
70e524eb 69 if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
e34d0e58 70 return $cidr if Net::IP->new($cidr);
7c619bbb
DM		 71 return undef if $noerr;
72 die Net::IP::Error() . "\n";
73 }
74 return undef if $noerr;
75 die "value does not look like a valid IP address or CIDR network\n";
76}
77
ae029a88
DM		 78PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
79sub pve_verify_ip_or_cidr_or_alias {
7c619bbb
DM		 80 my ($cidr, $noerr) = @_;
81
82 return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
83
ae029a88 84 return pve_verify_ip_or_cidr($cidr, $noerr);
009ee3ac
DM		 85}
86
e74a87f5
DM		 87PVE::JSONSchema::register_standard_option('ipset-name', {
88 description => "IP set name.",
89 type => 'string',
351052d1 90 pattern => $ipset_name_pattern,
387d0ffc 91 minLength => 2,
351052d1 92 maxLength => $max_ipset_name_length,
387d0ffc
DM		 93});
94
81d574a7
DM		 95PVE::JSONSchema::register_standard_option('pve-fw-alias', {
96 description => "Alias name.",
97 type => 'string',
351052d1 98 pattern => $ip_alias_pattern,
81d574a7 99 minLength => 2,
351052d1 100 maxLength => $max_alias_name_length,
81d574a7
DM		 101});
102
6302c41f
DM		 103PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
104 description => "Log level.",
e34d0e58 105 type => 'string',
6302c41f
DM		 106 enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
107 optional => 1,
108});
109
387d0ffc
DM		 110PVE::JSONSchema::register_standard_option('pve-security-group-name', {
111 description => "Security Group name.",
112 type => 'string',
44be8ceb 113 pattern => $security_group_name_pattern,
387d0ffc 114 minLength => 2,
351052d1 115 maxLength => $max_group_name_length,
e74a87f5 116});
009ee3ac 117
cbb5d6f3
DM		 118my $feature_ipset_nomatch = 0;
119eval {
120 my (undef, undef, $release) = POSIX::uname();
121 if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
122 my ($major, $minor) = ($1, $2);
123 $feature_ipset_nomatch = 1 if ($major > 3) ||
124 ($major == 3 && $minor >= 7);
125 }
126
127};
128
c8301d63 129my $nodename = PVE::INotify::nodename();
c1f17287 130my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
c8301d63 131
06320eb0
DM		 132my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
133
56f313f7 134my $default_log_level = 'nolog'; # avoid logs by default
cc37e000
TL		 135my $global_log_ratelimit = '--limit 1/sec';
136
2d404ffc
DM		 137my $log_level_hash = {
138 debug => 7,
139 info => 6,
140 notice => 5,
141 warning => 4,
142 err => 3,
143 crit => 2,
144 alert => 1,
145 emerg => 0,
146};
147
40af93c4
TL		 148my $verbose = 0;
149sub set_verbose {
150 $verbose = shift;
151}
152
044409e5
TW		 153# %rule
154#
155# name => optional
30c390f9 156# enable => [0|1]
044409e5
TW		 157# action =>
158# proto =>
30c390f9
TW		 159# sport => port[,port[,port]].. or port:port
160# dport => port[,port[,port]].. or port:port
044409e5
TW		 161# log => optional, loglevel
162# logmsg => optional, logmsg - overwrites default
30c390f9
TW		 163# iface_in => incomin interface
164# iface_out => outgoing interface
044409e5
TW		 165# match => optional, overwrites generation of match
166# target => optional, overwrites action
167
35d1d6da
DM		 168# we need to overwrite some macros for ipv6
169my $pve_ipv6fw_macros = {
170 'Ping' => [
171 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
172 ],
b3d75afb
WB		 173 'NeighborDiscovery' => [
174 "IPv6 neighbor solicitation, neighbor and router advertisement",
c71cdd44 175 { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
b3d75afb
WB		 176 { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
177 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
178 { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
179 ],
a42e9763 180 'DHCPv6' => [
24dd51c2 181 "DHCPv6 traffic",
a42e9763
WB		 182 { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
183 ],
35d1d6da
DM		 184 'Trcrt' => [
185 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
186 { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
187 ],
188 };
189
857f62c8 190# imported/converted from: /usr/share/shorewall/macro.*
961b4928 191my $pve_fw_macros = {
857f62c8 192 'Amanda' => [
ebd54ae9 193 "Amanda Backup",
857f62c8
DM		 194 { action => 'PARAM', proto => 'udp', dport => '10080' },
195 { action => 'PARAM', proto => 'tcp', dport => '10080' },
196 ],
197 'Auth' => [
ebd54ae9 198 "Auth (identd) traffic",
857f62c8
DM		 199 { action => 'PARAM', proto => 'tcp', dport => '113' },
200 ],
201 'BGP' => [
ebd54ae9 202 "Border Gateway Protocol traffic",
857f62c8
DM		 203 { action => 'PARAM', proto => 'tcp', dport => '179' },
204 ],
205 'BitTorrent' => [
ebd54ae9 206 "BitTorrent traffic for BitTorrent 3.1 and earlier",
961b4928 207 { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
857f62c8
DM		 208 { action => 'PARAM', proto => 'udp', dport => '6881' },
209 ],
210 'BitTorrent32' => [
ebd54ae9 211 "BitTorrent traffic for BitTorrent 3.2 and later",
857f62c8
DM		 212 { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
213 { action => 'PARAM', proto => 'udp', dport => '6881' },
214 ],
06ba9c44
AG		 215 'Ceph' => [
216 "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
a44539a3 217 # Legacy port for protocol v1
06ba9c44 218 { action => 'PARAM', proto => 'tcp', dport => '6789' },
a44539a3
CE		 219 # New port for protocol v2
220 { action => 'PARAM', proto => 'tcp', dport => '3300' },
06ba9c44
AG		 221 { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
222 ],
857f62c8 223 'CVS' => [
ebd54ae9 224 "Concurrent Versions System pserver traffic",
857f62c8
DM		 225 { action => 'PARAM', proto => 'tcp', dport => '2401' },
226 ],
227 'Citrix' => [
ebd54ae9 228 "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
857f62c8
DM		 229 { action => 'PARAM', proto => 'tcp', dport => '1494' },
230 { action => 'PARAM', proto => 'udp', dport => '1604' },
231 { action => 'PARAM', proto => 'tcp', dport => '2598' },
232 ],
233 'DAAP' => [
ebd54ae9 234 "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
857f62c8
DM		 235 { action => 'PARAM', proto => 'tcp', dport => '3689' },
236 { action => 'PARAM', proto => 'udp', dport => '3689' },
237 ],
238 'DCC' => [
ebd54ae9 239 "Distributed Checksum Clearinghouse spam filtering mechanism",
857f62c8
DM		 240 { action => 'PARAM', proto => 'tcp', dport => '6277' },
241 ],
242 'DHCPfwd' => [
d2c3266d 243 "Forwarded DHCP traffic",
857f62c8 244 { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
857f62c8
DM		 245 ],
246 'DNS' => [
ebd54ae9 247 "Domain Name System traffic (upd and tcp)",
857f62c8
DM		 248 { action => 'PARAM', proto => 'udp', dport => '53' },
249 { action => 'PARAM', proto => 'tcp', dport => '53' },
250 ],
251 'Distcc' => [
ebd54ae9 252 "Distributed Compiler service",
857f62c8
DM		 253 { action => 'PARAM', proto => 'tcp', dport => '3632' },
254 ],
857f62c8 255 'FTP' => [
ebd54ae9 256 "File Transfer Protocol",
857f62c8
DM		 257 { action => 'PARAM', proto => 'tcp', dport => '21' },
258 ],
259 'Finger' => [
ebd54ae9 260 "Finger protocol (RFC 742)",
857f62c8
DM		 261 { action => 'PARAM', proto => 'tcp', dport => '79' },
262 ],
263 'GNUnet' => [
ebd54ae9 264 "GNUnet secure peer-to-peer networking traffic",
857f62c8
DM		 265 { action => 'PARAM', proto => 'tcp', dport => '2086' },
266 { action => 'PARAM', proto => 'udp', dport => '2086' },
267 { action => 'PARAM', proto => 'tcp', dport => '1080' },
268 { action => 'PARAM', proto => 'udp', dport => '1080' },
269 ],
270 'GRE' => [
d2c3266d 271 "Generic Routing Encapsulation tunneling protocol",
857f62c8 272 { action => 'PARAM', proto => '47' },
857f62c8
DM		 273 ],
274 'Git' => [
ebd54ae9 275 "Git distributed revision control traffic",
857f62c8
DM		 276 { action => 'PARAM', proto => 'tcp', dport => '9418' },
277 ],
857f62c8 278 'HKP' => [
ebd54ae9 279 "OpenPGP HTTP keyserver protocol traffic",
857f62c8
DM		 280 { action => 'PARAM', proto => 'tcp', dport => '11371' },
281 ],
282 'HTTP' => [
ebd54ae9 283 "Hypertext Transfer Protocol (WWW)",
961b4928
DM		 284 { action => 'PARAM', proto => 'tcp', dport => '80' },
285 ],
857f62c8 286 'HTTPS' => [
ebd54ae9 287 "Hypertext Transfer Protocol (WWW) over SSL",
857f62c8
DM		 288 { action => 'PARAM', proto => 'tcp', dport => '443' },
289 ],
290 'ICPV2' => [
ebd54ae9 291 "Internet Cache Protocol V2 (Squid) traffic",
857f62c8
DM		 292 { action => 'PARAM', proto => 'udp', dport => '3130' },
293 ],
294 'ICQ' => [
ebd54ae9 295 "AOL Instant Messenger traffic",
857f62c8
DM		 296 { action => 'PARAM', proto => 'tcp', dport => '5190' },
297 ],
298 'IMAP' => [
ebd54ae9 299 "Internet Message Access Protocol",
857f62c8
DM		 300 { action => 'PARAM', proto => 'tcp', dport => '143' },
301 ],
302 'IMAPS' => [
ebd54ae9 303 "Internet Message Access Protocol over SSL",
857f62c8
DM		 304 { action => 'PARAM', proto => 'tcp', dport => '993' },
305 ],
306 'IPIP' => [
d2c3266d 307 "IPIP capsulation traffic",
857f62c8 308 { action => 'PARAM', proto => '94' },
857f62c8 309 ],
857f62c8 310 'IPsec' => [
d2c3266d 311 "IPsec traffic",
857f62c8
DM		 312 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
313 { action => 'PARAM', proto => '50' },
857f62c8
DM		 314 ],
315 'IPsecah' => [
d2c3266d 316 "IPsec authentication (AH) traffic",
857f62c8
DM		 317 { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
318 { action => 'PARAM', proto => '51' },
857f62c8
DM		 319 ],
320 'IPsecnat' => [
d2c3266d 321 "IPsec traffic and Nat-Traversal",
857f62c8
DM		 322 { action => 'PARAM', proto => 'udp', dport => '500' },
323 { action => 'PARAM', proto => 'udp', dport => '4500' },
324 { action => 'PARAM', proto => '50' },
857f62c8
DM		 325 ],
326 'IRC' => [
ebd54ae9 327 "Internet Relay Chat traffic",
857f62c8
DM		 328 { action => 'PARAM', proto => 'tcp', dport => '6667' },
329 ],
857f62c8 330 'Jetdirect' => [
ebd54ae9 331 "HP Jetdirect printing",
857f62c8
DM		 332 { action => 'PARAM', proto => 'tcp', dport => '9100' },
333 ],
334 'L2TP' => [
ebd54ae9 335 "Layer 2 Tunneling Protocol traffic",
857f62c8 336 { action => 'PARAM', proto => 'udp', dport => '1701' },
857f62c8
DM		 337 ],
338 'LDAP' => [
ebd54ae9 339 "Lightweight Directory Access Protocol traffic",
857f62c8
DM		 340 { action => 'PARAM', proto => 'tcp', dport => '389' },
341 ],
342 'LDAPS' => [
ebd54ae9 343 "Secure Lightweight Directory Access Protocol traffic",
857f62c8
DM		 344 { action => 'PARAM', proto => 'tcp', dport => '636' },
345 ],
346 'MSNP' => [
ebd54ae9 347 "Microsoft Notification Protocol",
857f62c8
DM		 348 { action => 'PARAM', proto => 'tcp', dport => '1863' },
349 ],
350 'MSSQL' => [
ebd54ae9 351 "Microsoft SQL Server",
857f62c8
DM		 352 { action => 'PARAM', proto => 'tcp', dport => '1433' },
353 ],
354 'Mail' => [
ebd54ae9 355 "Mail traffic (SMTP, SMTPS, Submission)",
857f62c8
DM		 356 { action => 'PARAM', proto => 'tcp', dport => '25' },
357 { action => 'PARAM', proto => 'tcp', dport => '465' },
358 { action => 'PARAM', proto => 'tcp', dport => '587' },
359 ],
7831e1e3
EK		 360 'MDNS' => [
361 "Multicast DNS",
362 { action => 'PARAM', proto => 'udp', dport => '5353' },
363 ],
857f62c8 364 'Munin' => [
ebd54ae9 365 "Munin networked resource monitoring traffic",
857f62c8
DM		 366 { action => 'PARAM', proto => 'tcp', dport => '4949' },
367 ],
368 'MySQL' => [
ebd54ae9 369 "MySQL server",
857f62c8
DM		 370 { action => 'PARAM', proto => 'tcp', dport => '3306' },
371 ],
372 'NNTP' => [
ebd54ae9 373 "NNTP traffic (Usenet).",
857f62c8
DM		 374 { action => 'PARAM', proto => 'tcp', dport => '119' },
375 ],
376 'NNTPS' => [
ebd54ae9 377 "Encrypted NNTP traffic (Usenet)",
857f62c8
DM		 378 { action => 'PARAM', proto => 'tcp', dport => '563' },
379 ],
380 'NTP' => [
ebd54ae9 381 "Network Time Protocol (ntpd)",
857f62c8
DM		 382 { action => 'PARAM', proto => 'udp', dport => '123' },
383 ],
857f62c8 384 'OSPF' => [
ebd54ae9 385 "OSPF multicast traffic",
857f62c8
DM		 386 { action => 'PARAM', proto => '89' },
387 ],
388 'OpenVPN' => [
ebd54ae9 389 "OpenVPN traffic",
857f62c8
DM		 390 { action => 'PARAM', proto => 'udp', dport => '1194' },
391 ],
392 'PCA' => [
ebd54ae9 393 "Symantec PCAnywere (tm)",
857f62c8
DM		 394 { action => 'PARAM', proto => 'udp', dport => '5632' },
395 { action => 'PARAM', proto => 'tcp', dport => '5631' },
396 ],
397 'POP3' => [
ebd54ae9 398 "POP3 traffic",
857f62c8
DM		 399 { action => 'PARAM', proto => 'tcp', dport => '110' },
400 ],
401 'POP3S' => [
ebd54ae9 402 "Encrypted POP3 traffic",
857f62c8
DM		 403 { action => 'PARAM', proto => 'tcp', dport => '995' },
404 ],
405 'PPtP' => [
ebd54ae9 406 "Point-to-Point Tunneling Protocol",
857f62c8 407 { action => 'PARAM', proto => '47' },
857f62c8
DM		 408 { action => 'PARAM', proto => 'tcp', dport => '1723' },
409 ],
410 'Ping' => [
ebd54ae9 411 "ICMP echo request",
269d4f13 412 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 413 ],
414 'PostgreSQL' => [
ebd54ae9 415 "PostgreSQL server",
857f62c8
DM		 416 { action => 'PARAM', proto => 'tcp', dport => '5432' },
417 ],
418 'Printer' => [
ebd54ae9 419 "Line Printer protocol printing",
857f62c8
DM		 420 { action => 'PARAM', proto => 'tcp', dport => '515' },
421 ],
422 'RDP' => [
ebd54ae9 423 "Microsoft Remote Desktop Protocol traffic",
857f62c8
DM		 424 { action => 'PARAM', proto => 'tcp', dport => '3389' },
425 ],
d2c3266d 426 'RIP' => [
ebd54ae9 427 "Routing Information Protocol (bidirectional)",
857f62c8 428 { action => 'PARAM', proto => 'udp', dport => '520' },
857f62c8
DM		 429 ],
430 'RNDC' => [
ebd54ae9 431 "BIND remote management protocol",
857f62c8
DM		 432 { action => 'PARAM', proto => 'tcp', dport => '953' },
433 ],
434 'Razor' => [
ebd54ae9 435 "Razor Antispam System",
056f9211 436 { action => 'PARAM', proto => 'tcp', dport => '2703' },
857f62c8
DM		 437 ],
438 'Rdate' => [
ebd54ae9 439 "Remote time retrieval (rdate)",
857f62c8
DM		 440 { action => 'PARAM', proto => 'tcp', dport => '37' },
441 ],
442 'Rsync' => [
ebd54ae9 443 "Rsync server",
857f62c8
DM		 444 { action => 'PARAM', proto => 'tcp', dport => '873' },
445 ],
446 'SANE' => [
ebd54ae9 447 "SANE network scanning",
857f62c8
DM		 448 { action => 'PARAM', proto => 'tcp', dport => '6566' },
449 ],
450 'SMB' => [
ebd54ae9 451 "Microsoft SMB traffic",
857f62c8
DM		 452 { action => 'PARAM', proto => 'udp', dport => '135,445' },
453 { action => 'PARAM', proto => 'udp', dport => '137:139' },
454 { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
455 { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
456 ],
857f62c8 457 'SMBswat' => [
ebd54ae9 458 "Samba Web Administration Tool",
857f62c8
DM		 459 { action => 'PARAM', proto => 'tcp', dport => '901' },
460 ],
461 'SMTP' => [
ebd54ae9 462 "Simple Mail Transfer Protocol",
857f62c8
DM		 463 { action => 'PARAM', proto => 'tcp', dport => '25' },
464 ],
465 'SMTPS' => [
ebd54ae9 466 "Encrypted Simple Mail Transfer Protocol",
857f62c8
DM		 467 { action => 'PARAM', proto => 'tcp', dport => '465' },
468 ],
469 'SNMP' => [
ebd54ae9 470 "Simple Network Management Protocol",
857f62c8
DM		 471 { action => 'PARAM', proto => 'udp', dport => '161:162' },
472 { action => 'PARAM', proto => 'tcp', dport => '161' },
473 ],
474 'SPAMD' => [
ebd54ae9 475 "Spam Assassin SPAMD traffic",
857f62c8
DM		 476 { action => 'PARAM', proto => 'tcp', dport => '783' },
477 ],
478 'SSH' => [
ebd54ae9 479 "Secure shell traffic",
857f62c8
DM		 480 { action => 'PARAM', proto => 'tcp', dport => '22' },
481 ],
482 'SVN' => [
ebd54ae9 483 "Subversion server (svnserve)",
857f62c8
DM		 484 { action => 'PARAM', proto => 'tcp', dport => '3690' },
485 ],
486 'SixXS' => [
ebd54ae9 487 "SixXS IPv6 Deployment and Tunnel Broker",
857f62c8
DM		 488 { action => 'PARAM', proto => 'tcp', dport => '3874' },
489 { action => 'PARAM', proto => 'udp', dport => '3740' },
490 { action => 'PARAM', proto => '41' },
491 { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
492 ],
493 'Squid' => [
ebd54ae9 494 "Squid web proxy traffic",
857f62c8
DM		 495 { action => 'PARAM', proto => 'tcp', dport => '3128' },
496 ],
497 'Submission' => [
ebd54ae9 498 "Mail message submission traffic",
857f62c8
DM		 499 { action => 'PARAM', proto => 'tcp', dport => '587' },
500 ],
501 'Syslog' => [
ebd54ae9 502 "Syslog protocol (RFC 5424) traffic",
857f62c8
DM		 503 { action => 'PARAM', proto => 'udp', dport => '514' },
504 { action => 'PARAM', proto => 'tcp', dport => '514' },
505 ],
506 'TFTP' => [
ebd54ae9 507 "Trivial File Transfer Protocol traffic",
857f62c8
DM		 508 { action => 'PARAM', proto => 'udp', dport => '69' },
509 ],
510 'Telnet' => [
ebd54ae9 511 "Telnet traffic",
857f62c8
DM		 512 { action => 'PARAM', proto => 'tcp', dport => '23' },
513 ],
514 'Telnets' => [
ebd54ae9 515 "Telnet over SSL",
857f62c8
DM		 516 { action => 'PARAM', proto => 'tcp', dport => '992' },
517 ],
518 'Time' => [
ebd54ae9 519 "RFC 868 Time protocol",
857f62c8
DM		 520 { action => 'PARAM', proto => 'tcp', dport => '37' },
521 ],
522 'Trcrt' => [
ebd54ae9 523 "Traceroute (for up to 30 hops) traffic",
857f62c8 524 { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
269d4f13 525 { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
857f62c8
DM		 526 ],
527 'VNC' => [
93be4333
DM		 528 "VNC traffic for VNC display's 0 - 99",
529 { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
857f62c8
DM		 530 ],
531 'VNCL' => [
ebd54ae9 532 "VNC traffic from Vncservers to Vncviewers in listen mode",
857f62c8
DM		 533 { action => 'PARAM', proto => 'tcp', dport => '5500' },
534 ],
535 'Web' => [
ebd54ae9 536 "WWW traffic (HTTP and HTTPS)",
857f62c8 537 { action => 'PARAM', proto => 'tcp', dport => '80' },
961b4928
DM		 538 { action => 'PARAM', proto => 'tcp', dport => '443' },
539 ],
857f62c8 540 'Webcache' => [
ebd54ae9 541 "Web Cache/Proxy traffic (port 8080)",
857f62c8
DM		 542 { action => 'PARAM', proto => 'tcp', dport => '8080' },
543 ],
544 'Webmin' => [
ebd54ae9 545 "Webmin traffic",
857f62c8
DM		 546 { action => 'PARAM', proto => 'tcp', dport => '10000' },
547 ],
548 'Whois' => [
ebd54ae9 549 "Whois (nicname, RFC 3912) traffic",
857f62c8
DM		 550 { action => 'PARAM', proto => 'tcp', dport => '43' },
551 ],
961b4928
DM		 552};
553
554my $pve_fw_parsed_macros;
ebd54ae9 555my $pve_fw_macro_descr;
21a18e53 556my $pve_fw_macro_ipversion = {};
961b4928 557my $pve_fw_preferred_macro_names = {};
3a616aa0 558
fe3d79b4
WB		 559my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
560my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
561
5547adf7 562my $pve_std_chains = {};
cfd7cd9c
TW		 563my $pve_std_chains_conf = {};
564$pve_std_chains_conf->{4} = {
d8f2505e 565 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 566 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
d8f2505e 567 ],
79929d9c
DM		 568 'PVEFW-DropBroadcast' => [
569 # same as shorewall 'Broadcast'
570 # simply DROP BROADCAST/MULTICAST/ANYCAST
571 # we can use this to reduce logging
572 { action => 'DROP', dsttype => 'BROADCAST' },
573 { action => 'DROP', dsttype => 'MULTICAST' },
574 { action => 'DROP', dsttype => 'ANYCAST' },
cbb5d6f3 575 { action => 'DROP', dest => '224.0.0.0/4' },
79929d9c
DM		 576 ],
577 'PVEFW-reject' => [
578 # same as shorewall 'reject'
579 { action => 'DROP', dsttype => 'BROADCAST' },
cbb5d6f3 580 { action => 'DROP', source => '224.0.0.0/4' },
79929d9c 581 { action => 'DROP', proto => 'icmp' },
044409e5
TW		 582 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
583 { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
584 { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
585 { target => '-j REJECT --reject-with icmp-host-prohibited' },
79929d9c
DM		 586 ],
587 'PVEFW-Drop' => [
cbb5d6f3 588 # same as shorewall 'Drop', which is equal to DROP,
79929d9c
DM		 589 # but REJECT/DROP some packages to reduce logging,
590 # and ACCEPT critical ICMP types
591 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
592 # we are not interested in BROADCAST/MULTICAST/ANYCAST
593 { action => 'PVEFW-DropBroadcast' },
594 # ACCEPT critical ICMP types
595 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
596 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
597 # Drop packets with INVALID state
044409e5 598 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 599 # Drop Microsoft SMB noise
e4882cff
TW		 600 { action => 'DROP', proto => 'udp', dport => '135,445' },
601 { action => 'DROP', proto => 'udp', dport => '137:139' },
79929d9c 602 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 603 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 604 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
605 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 606 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 607 # Drop DNS replies
608 { action => 'DROP', proto => 'udp', sport => 53 },
609 ],
610 'PVEFW-Reject' => [
cbb5d6f3 611 # same as shorewall 'Reject', which is equal to Reject,
79929d9c
DM		 612 # but REJECT/DROP some packages to reduce logging,
613 # and ACCEPT critical ICMP types
614 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
615 # we are not interested in BROADCAST/MULTICAST/ANYCAST
616 { action => 'PVEFW-DropBroadcast' },
617 # ACCEPT critical ICMP types
618 { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
619 { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
620 # Drop packets with INVALID state
044409e5 621 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
79929d9c 622 # Drop Microsoft SMB noise
e4882cff 623 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
79929d9c
DM		 624 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
625 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 626 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
79929d9c
DM		 627 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
628 # Drop new/NotSyn traffic so that it doesn't get logged
044409e5 629 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
79929d9c
DM		 630 # Drop DNS replies
631 { action => 'DROP', proto => 'udp', sport => 53 },
632 ],
d86659ef
DM		 633 'PVEFW-tcpflags' => [
634 # same as shorewall tcpflags action.
635 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
044409e5
TW		 636 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
637 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
638 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
639 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
640 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
d86659ef 641 ],
bee633ab
DM		 642 'PVEFW-smurfs' => [
643 # same as shorewall smurfs action
644 # Filter packets for smurfs (packets with a broadcast address as the source).
044409e5
TW		 645 { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
646 { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
647 { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
648 ],
649 'PVEFW-smurflog' => [
650 { action => 'DROP', logmsg => 'DROP: ' },
651 ],
652 'PVEFW-logflags' => [
653 { action => 'DROP', logmsg => 'DROP: ' },
bee633ab 654 ],
d8f2505e
DM		 655};
656
cfd7cd9c 657$pve_std_chains_conf->{6} = {
47a79ff2 658 'PVEFW-SET-ACCEPT-MARK' => [
044409e5 659 { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
47a79ff2
AD		 660 ],
661 'PVEFW-DropBroadcast' => [
044409e5
TW		 662 # same as shorewall 'Broadcast'
663 # simply DROP BROADCAST/MULTICAST/ANYCAST
664 # we can use this to reduce logging
665 #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
649cd835
DM		 666 # ipv6 addrtype does not work with kernel 2.6.32
667 #{ action => 'DROP', dsttype => 'MULTICAST' },
044409e5
TW		 668 #{ action => 'DROP', dsttype => 'ANYCAST' },
669 { action => 'DROP', dest => 'ff00::/8' },
670 #{ action => 'DROP', dest => '224.0.0.0/4' },
47a79ff2
AD		 671 ],
672 'PVEFW-reject' => [
649cd835 673 { action => 'DROP', proto => 'icmpv6' },
044409e5 674 { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
58ca8ec0
AD		 675 { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
676 { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
47a79ff2
AD		 677 ],
678 'PVEFW-Drop' => [
044409e5
TW		 679 # same as shorewall 'Drop', which is equal to DROP,
680 # but REJECT/DROP some packages to reduce logging,
681 # and ACCEPT critical ICMP types
649cd835 682 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
044409e5
TW		 683 # we are not interested in BROADCAST/MULTICAST/ANYCAST
684 { action => 'PVEFW-DropBroadcast' },
685 # ACCEPT critical ICMP types
686 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
687 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
688 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
689 # Drop packets with INVALID state
690 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
691 # Drop Microsoft SMB noise
e4882cff 692 { action => 'DROP', proto => 'udp', dport => '135,445' },
649cd835
DM		 693 { action => 'DROP', proto => 'udp', dport => '137:139'},
694 { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 695 { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
649cd835 696 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
044409e5
TW		 697 # Drop new/NotSyn traffic so that it doesn't get logged
698 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
699 # Drop DNS replies
649cd835 700 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 701 ],
702 'PVEFW-Reject' => [
044409e5
TW		 703 # same as shorewall 'Reject', which is equal to Reject,
704 # but REJECT/DROP some packages to reduce logging,
705 # and ACCEPT critical ICMP types
706 { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
707 # we are not interested in BROADCAST/MULTICAST/ANYCAST
708 { action => 'PVEFW-DropBroadcast' },
709 # ACCEPT critical ICMP types
710 { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
711 { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
712 { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
713 # Drop packets with INVALID state
714 { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
715 # Drop Microsoft SMB noise
e4882cff
TW		 716 { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
717 { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
044409e5 718 { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
e4882cff 719 { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
044409e5
TW		 720 { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
721 # Drop new/NotSyn traffic so that it doesn't get logged
722 { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
723 # Drop DNS replies
724 { action => 'DROP', proto => 'udp', sport => 53 },
47a79ff2
AD		 725 ],
726 'PVEFW-tcpflags' => [
044409e5
TW		 727 # same as shorewall tcpflags action.
728 # Packets arriving on this interface are checked for som illegal combinations of TCP flags
729 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
730 { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
731 { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
732 { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
733 { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
734 ],
735 'PVEFW-logflags' => [
736 { action => 'DROP', logmsg => 'DROP: ' },
47a79ff2 737 ],
47a79ff2
AD		 738};
739
4b586518
DM		 740# iptables -p icmp -h
741my $icmp_type_names = {
742 any => 1,
743 'echo-reply' => 1,
744 'destination-unreachable' => 1,
745 'network-unreachable' => 1,
746 'host-unreachable' => 1,
747 'protocol-unreachable' => 1,
748 'port-unreachable' => 1,
749 'fragmentation-needed' => 1,
750 'source-route-failed' => 1,
751 'network-unknown' => 1,
752 'host-unknown' => 1,
753 'network-prohibited' => 1,
754 'host-prohibited' => 1,
755 'TOS-network-unreachable' => 1,
756 'TOS-host-unreachable' => 1,
757 'communication-prohibited' => 1,
758 'host-precedence-violation' => 1,
759 'precedence-cutoff' => 1,
760 'source-quench' => 1,
761 'redirect' => 1,
762 'network-redirect' => 1,
763 'host-redirect' => 1,
764 'TOS-network-redirect' => 1,
765 'TOS-host-redirect' => 1,
766 'echo-request' => 1,
767 'router-advertisement' => 1,
768 'router-solicitation' => 1,
769 'time-exceeded' => 1,
770 'ttl-zero-during-transit' => 1,
771 'ttl-zero-during-reassembly' => 1,
772 'parameter-problem' => 1,
773 'ip-header-bad' => 1,
774 'required-option-missing' => 1,
775 'timestamp-request' => 1,
776 'timestamp-reply' => 1,
777 'address-mask-request' => 1,
778 'address-mask-reply' => 1,
779};
780
041b9277
DM		 781# ip6tables -p icmpv6 -h
782
783my $icmpv6_type_names = {
784 'any' => 1,
785 'destination-unreachable' => 1,
786 'no-route' => 1,
787 'communication-prohibited' => 1,
788 'address-unreachable' => 1,
789 'port-unreachable' => 1,
790 'packet-too-big' => 1,
791 'time-exceeded' => 1,
792 'ttl-zero-during-transit' => 1,
793 'ttl-zero-during-reassembly' => 1,
794 'parameter-problem' => 1,
795 'bad-header' => 1,
796 'unknown-header-type' => 1,
797 'unknown-option' => 1,
798 'echo-request' => 1,
799 'echo-reply' => 1,
800 'router-solicitation' => 1,
801 'router-advertisement' => 1,
593604cc 802 'neighbor-solicitation' => 1,
041b9277 803 'neighbour-solicitation' => 1,
593604cc 804 'neighbor-advertisement' => 1,
041b9277
DM		 805 'neighbour-advertisement' => 1,
806 'redirect' => 1,
807};
808
54cd19a8 809sub init_firewall_macros {
6158271d 810
961b4928 811 $pve_fw_parsed_macros = {};
9aab3127 812
21a18e53
WB		 813 my $parse = sub {
814 my ($k, $macro) = @_;
e5076eee 815 my $lc_name = lc($k);
21a18e53
WB		 816 $pve_fw_macro_ipversion->{$k} = 0;
817 while (!ref($macro->[0])) {
818 my $desc = shift @$macro;
819 if ($desc eq 'ipv4only') {
820 $pve_fw_macro_ipversion->{$k} = 4;
821 } elsif ($desc eq 'ipv6only') {
822 $pve_fw_macro_ipversion->{$k} = 6;
823 } else {
824 $pve_fw_macro_descr->{$k} = $desc;
825 }
ebd54ae9 826 }
e5076eee
DM		 827 $pve_fw_preferred_macro_names->{$lc_name} = $k;
828 $pve_fw_parsed_macros->{$k} = $macro;
21a18e53
WB		 829 };
830
831 foreach my $k (keys %$pve_fw_macros) {
832 &$parse($k, $pve_fw_macros->{$k});
833 }
834
835 foreach my $k (keys %$pve_ipv6fw_macros) {
836 next if $pve_fw_parsed_macros->{$k};
837 &$parse($k, $pve_ipv6fw_macros->{$k});
838 $pve_fw_macro_ipversion->{$k} = 6;
961b4928 839 }
9aab3127
DM		 840}
841
54cd19a8
DM		 842init_firewall_macros();
843
ebd54ae9
DM		 844sub get_macros {
845 return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
846}
847
fcba0beb
DM		 848my $etc_services;
849
850sub get_etc_services {
851
852 return $etc_services if $etc_services;
853
854 my $filename = "/etc/services";
855
856 my $fh = IO::File->new($filename, O_RDONLY);
857 if (!$fh) {
858 warn "unable to read '$filename' - $!\n";
859 return {};
860 }
861
862 my $services = {};
863
864 while (my $line = <$fh>) {
865 chomp ($line);
866 next if $line =~m/^#/;
867 next if ($line =~m/^\s*$/);
868
d50f24ea 869 if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
fcba0beb 870 $services->{byid}->{$2}->{name} = $1;
35b66e9d 871 $services->{byid}->{$2}->{port} = $2;
fcba0beb
DM		 872 $services->{byid}->{$2}->{$3} = 1;
873 $services->{byname}->{$1} = $services->{byid}->{$2};
874 }
875 }
876
877 close($fh);
878
6158271d
DM		 879 $etc_services = $services;
880
3a616aa0 881
fcba0beb
DM		 882 return $etc_services;
883}
884
58bc569d
WB		 885sub parse_protocol_file {
886 my ($filename) = @_;
fcba0beb
DM		 887
888 my $fh = IO::File->new($filename, O_RDONLY);
889 if (!$fh) {
890 warn "unable to read '$filename' - $!\n";
891 return {};
892 }
893
894 my $protocols = {};
895
896 while (my $line = <$fh>) {
897 chomp ($line);
898 next if $line =~m/^#/;
899 next if ($line =~m/^\s*$/);
900
d6dd6e96 901 if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
fcba0beb
DM		 902 $protocols->{byid}->{$2}->{name} = $1;
903 $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
904 }
905 }
906
907 close($fh);
908
58bc569d
WB		 909 return $protocols;
910}
911
912my $etc_protocols;
913
914sub get_etc_protocols {
915 return $etc_protocols if $etc_protocols;
916
917 my $protocols = parse_protocol_file('/etc/protocols');
918
041b9277
DM		 919 # add special case for ICMP v6
920 $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
921 $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
922
fcba0beb
DM		 923 $etc_protocols = $protocols;
924
925 return $etc_protocols;
926}
927
b452ea10
WB		 928my $etc_ethertypes;
929
930sub get_etc_ethertypes {
931 $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
932 if !$etc_ethertypes;
933 return $etc_ethertypes;
934}
935
525778d7 936my $__local_network;
93be4333 937
525778d7 938sub local_network {
ac633d30 939 my ($new_value) = @_;
93be4333 940
525778d7 941 $__local_network = $new_value if defined($new_value);
ac633d30 942
525778d7 943 return $__local_network if defined($__local_network);
93be4333
DM		 944
945 eval {
946 my $nodename = PVE::INotify::nodename();
947
948 my $ip = PVE::Cluster::remote_node_ip($nodename);
949
950 my $testip = Net::IP->new($ip);
bfc488f6 951
5dc356af
WB		 952 my $isv6 = $testip->version == 6;
953 my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
954 : PVE::ProcFSTools::read_proc_net_route();
93be4333 955 foreach my $entry (@$routes) {
5dc356af
WB		 956 my $mask;
957 if ($isv6) {
958 $mask = $entry->{prefix};
15c80000 959 next if !$mask; # skip the default route...
5dc356af 960 } else {
2e1ae6b9 961 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
5dc356af
WB		 962 next if !defined($mask);
963 }
93be4333
DM		 964 my $cidr = "$entry->{dest}/$mask";
965 my $testnet = Net::IP->new($cidr);
15c80000
WB		 966 my $overlap = $testnet->overlaps($testip);
967 if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
968 $overlap == $Net::IP::IP_IDENTICAL)
969 {
525778d7 970 $__local_network = $cidr;
93be4333
DM		 971 return;
972 }
973 }
974 };
975 warn $@ if $@;
976
525778d7 977 return $__local_network;
93be4333
DM		 978}
979
6d959e3f
DM		 980# ipset names are limited to 31 characters,
981# and we use '-v4' or '-v6' to indicate IP versions,
982# and we use '_swap' suffix for atomic update,
983# for example PVEFW-${VMID}-${ipset_name}_swap
30150dca 984
88c26d5e 985my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
708ba714
DM		 986
987sub compute_ipset_chain_name {
88c26d5e 988 my ($vmid, $ipset_name, $ipversion) = @_;
708ba714
DM		 989
990 $vmid = 0 if !defined($vmid);
991
88c26d5e 992 my $id = "$vmid-${ipset_name}-v$ipversion";
708ba714 993
88c26d5e 994 if (length($id) > $max_iptables_ipset_name_length) {
708ba714
DM		 995 $id = PVE::Tools::fnv31a_hex($id);
996 }
997
998 return "PVEFW-$id";
999}
1000
b692f42c
DM		 1001sub compute_ipfilter_ipset_name {
1002 my ($iface) = @_;
1003
1004 return "ipfilter-$iface";
1005}
1006
ecbea048
DM		 1007sub parse_address_list {
1008 my ($str) = @_;
1009
e2c62733
DM		 1010 if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1011 die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1012 return;
1013 }
1014
1015 if ($str =~ m/^${ip_alias_pattern}$/) {
1016 die "alias name too long\n" if length($str) > $max_alias_name_length;
1017 return;
1018 }
d72beb8e 1019
3162af6b
DM		 1020 my $count = 0;
1021 my $iprange = 0;
a589b6ac 1022 my $ipversion;
7697c041 1023
55b47371
WB		 1024 my @elements = split(/,/, $str);
1025 die "extraneous commas in list\n" if $str ne join(',', @elements);
1026 foreach my $elem (@elements) {
3162af6b 1027 $count++;
c344e509
DM		 1028 my $ip = Net::IP->new($elem);
1029 if (!$ip) {
ecbea048
DM		 1030 my $err = Net::IP::Error();
1031 die "invalid IP address: $err\n";
1032 }
3162af6b 1033 $iprange = 1 if $elem =~ m/-/;
a589b6ac 1034
c344e509 1035 my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
a589b6ac
DM		 1036
1037 die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
006490cb 1038 if $ipversion && ($new_ipversion != $ipversion);
a589b6ac
DM		 1039
1040 $ipversion = $new_ipversion;
ecbea048 1041 }
e34d0e58 1042
5163367b 1043 die "you can't use a range in a list\n" if $iprange && $count > 1;
a589b6ac 1044
7697c041 1045 return $ipversion;
ecbea048 1046}
dddd9413 1047
fcba0beb 1048sub parse_port_name_number_or_range {
a1c04f71 1049 my ($str, $dport) = @_;
fcba0beb
DM		 1050
1051 my $services = PVE::Firewall::get_etc_services();
7ca36671 1052 my $count = 0;
041b7e8e
DM		 1053 my $icmp_port = 0;
1054
55b47371
WB		 1055 my @elements = split(/,/, $str);
1056 die "extraneous commas in list\n" if $str ne join(',', @elements);
1057 foreach my $item (@elements) {
aced7e7d 1058 if ($item =~ m/^([0-9]+):([0-9]+)$/) {
6a241ca7 1059 $count += 2;
7ca36671
DM		 1060 my ($port1, $port2) = ($1, $2);
1061 die "invalid port '$port1'\n" if $port1 > 65535;
1062 die "invalid port '$port2'\n" if $port2 > 65535;
12be0dfe 1063 die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
aced7e7d 1064 } elsif ($item =~ m/^([0-9]+)$/) {
6a241ca7 1065 $count += 1;
7ca36671
DM		 1066 my $port = $1;
1067 die "invalid port '$port'\n" if $port > 65535;
1068 } else {
a1c04f71 1069 if ($dport && $icmp_type_names->{$item}) {
041b7e8e 1070 $icmp_port = 1;
a1c04f71 1071 } elsif ($dport && $icmpv6_type_names->{$item}) {
041b9277 1072 $icmp_port = 1;
041b7e8e 1073 } else {
e34d0e58 1074 die "invalid port '$item'\n" if !$services->{byname}->{$item};
041b7e8e 1075 }
fcba0beb
DM		 1076 }
1077 }
1078
6a241ca7
WB		 1079 die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1080
1081 # I really don't like to use the word number here, but it's the only thing
1082 # that makes sense in a literal way. The range 1:100 counts as 2, not as
1083 # one and not as 100...
1084 die "too many entries in port list (> 15 numbers)\n"
1085 if $count > 15;
041b7e8e 1086
f776d6de 1087 return (scalar(@elements) > 1);
fcba0beb
DM		 1088}
1089
a1c04f71
WB		 1090PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1091sub pve_fw_verify_sport_spec {
1092 my ($portstr) = @_;
1093
1094 parse_port_name_number_or_range($portstr, 0);
1095
1096 return $portstr;
1097}
1098
1099PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1100sub pve_fw_verify_dport_spec {
54cd19a8
DM		 1101 my ($portstr) = @_;
1102
a1c04f71 1103 parse_port_name_number_or_range($portstr, 1);
54cd19a8
DM		 1104
1105 return $portstr;
1106}
1107
d31689ee
DM		 1108PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1109sub pve_fw_verify_addr_spec {
54cd19a8
DM		 1110 my ($list) = @_;
1111
1112 parse_address_list($list);
1113
1114 return $list;
1115}
1116
1117PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1118sub pve_fw_verify_protocol_spec {
1119 my ($proto) = @_;
1120
1121 my $protocols = get_etc_protocols();
1122
1123 die "unknown protocol '$proto'\n" if $proto &&
1124 !(defined($protocols->{byname}->{$proto}) ||
1125 defined($protocols->{byid}->{$proto}));
1126
1127 return $proto;
1128}
1129
1130
d1c53b3e 1131# helper function for API
d1c53b3e 1132
5d38d64f
DM		 1133sub copy_opject_with_digest {
1134 my ($object) = @_;
1135
1136 my $sha = Digest::SHA->new('sha1');
1137
1138 my $res = {};
1139 foreach my $k (sort keys %$object) {
1140 my $v = $object->{$k};
0365eb68 1141 next if !defined($v);
5d38d64f
DM		 1142 $res->{$k} = $v;
1143 $sha->add($k, ':', $v, "\n");
1144 }
1145
55e686c7 1146 my $digest = $sha->hexdigest;
5d38d64f
DM		 1147
1148 $res->{digest} = $digest;
1149
1150 return wantarray ? ($res, $digest) : $res;
1151}
1152
1153sub copy_list_with_digest {
1154 my ($list) = @_;
1155
1156 my $sha = Digest::SHA->new('sha1');
1157
1158 my $res = [];
1159 foreach my $entry (@$list) {
1160 my $data = {};
1161 foreach my $k (sort keys %$entry) {
1162 my $v = $entry->{$k};
0365eb68 1163 next if !defined($v);
5d38d64f 1164 $data->{$k} = $v;
6d9246e7 1165 # Note: digest ignores refs ($rule->{errors})
e83f0d00
DC		 1166 # since Digest::SHA expects a series of bytes,
1167 # we have to encode the value here to prevent errors when
1168 # using utf8 characters (eg. in comments)
1169 $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
5d38d64f
DM		 1170 }
1171 push @$res, $data;
1172 }
1173
55e686c7 1174 my $digest = $sha->hexdigest;
5d38d64f
DM		 1175
1176 foreach my $entry (@$res) {
1177 $entry->{digest} = $digest;
1178 }
1179
1180 return wantarray ? ($res, $digest) : $res;
1181}
1182
e313afe0
DM		 1183our $cluster_option_properties = {
1184 enable => {
1185 description => "Enable or disable the firewall cluster wide.",
1186 type => 'integer',
1187 minimum => 0,
1188 optional => 1,
1189 },
2549e7ef
SI		 1190 ebtables => {
1191 description => "Enable ebtables rules cluster wide.",
1192 type => 'boolean',
1193 default => 1,
1194 optional => 1,
1195 },
e313afe0
DM		 1196 policy_in => {
1197 description => "Input policy.",
1198 type => 'string',
1199 optional => 1,
1200 enum => ['ACCEPT', 'REJECT', 'DROP'],
1201 },
1202 policy_out => {
1203 description => "Output policy.",
1204 type => 'string',
1205 optional => 1,
1206 enum => ['ACCEPT', 'REJECT', 'DROP'],
1207 },
cc37e000
TL		 1208 log_ratelimit => {
1209 description => "Log ratelimiting settings",
1210 type => 'string', format => {
1211 enable => {
1212 default_key => 1,
1213 description => 'Enable or disable log rate limiting',
1214 type => 'boolean',
1215 default => '1',
1216 },
1217 rate => {
1218 type => 'string',
1219 description => 'Frequency with which the burst bucket gets refilled',
1220 optional => 1,
1221 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1222 format_description => 'rate',
1223 default => '1/second',
1224 },
1225 burst => {
1226 type => 'integer',
1227 minimum => 0,
1228 optional => 1,
1229 description => 'Inital burst of packages which will get logged',
1230 default => 5,
1231 },
1232 },
1233 optional => 1,
1234 },
e313afe0
DM		 1235};
1236
1237our $host_option_properties = {
1238 enable => {
1239 description => "Enable host firewall rules.",
1240 type => 'boolean',
1241 optional => 1,
1242 },
1243 log_level_in => get_standard_option('pve-fw-loglevel', {
1244 description => "Log level for incoming traffic." }),
1245 log_level_out => get_standard_option('pve-fw-loglevel', {
1246 description => "Log level for outgoing traffic." }),
1247 tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
1248 description => "Log level for illegal tcp flags filter." }),
1249 smurf_log_level => get_standard_option('pve-fw-loglevel', {
1250 description => "Log level for SMURFS filter." }),
1251 nosmurfs => {
1252 description => "Enable SMURFS filter.",
1253 type => 'boolean',
1254 optional => 1,
1255 },
1256 tcpflags => {
1257 description => "Filter illegal combinations of TCP flags.",
1258 type => 'boolean',
e1639957 1259 default => 0,
e313afe0
DM		 1260 optional => 1,
1261 },
1262 nf_conntrack_max => {
1263 description => "Maximum number of tracked connections.",
1264 type => 'integer',
1265 optional => 1,
b2ec31cc 1266 default => 262144,
e313afe0
DM		 1267 minimum => 32768,
1268 },
1269 nf_conntrack_tcp_timeout_established => {
1270 description => "Conntrack established timeout.",
1271 type => 'integer',
1272 optional => 1,
e1639957 1273 default => 432000,
e313afe0
DM		 1274 minimum => 7875,
1275 },
1276 ndp => {
e1639957 1277 description => "Enable NDP (Neighbor Discovery Protocol).",
e313afe0 1278 type => 'boolean',
e1639957 1279 default => 0,
e313afe0
DM		 1280 optional => 1,
1281 },
27c49e25
CE		 1282 nf_conntrack_allow_invalid => {
1283 description => "Allow invalid packets on connection tracking.",
1284 type => 'boolean',
1285 default => 0,
1286 optional => 1,
1287 },
e17d3eec
ML		 1288 log_nf_conntrack => {
1289 description => "Enable logging of conntrack information.",
1290 type => 'boolean',
1291 default => 0,
1292 optional => 1
1293 },
e313afe0
DM		 1294};
1295
1296our $vm_option_properties = {
1297 enable => {
1298 description => "Enable/disable firewall rules.",
1299 type => 'boolean',
e1639957 1300 default => 0,
e313afe0
DM		 1301 optional => 1,
1302 },
1303 macfilter => {
1304 description => "Enable/disable MAC address filter.",
1305 type => 'boolean',
e1639957 1306 default => 0,
e313afe0
DM		 1307 optional => 1,
1308 },
1309 dhcp => {
1310 description => "Enable DHCP.",
1311 type => 'boolean',
e1639957 1312 default => 0,
e313afe0
DM		 1313 optional => 1,
1314 },
1315 ndp => {
e1639957 1316 description => "Enable NDP (Neighbor Discovery Protocol).",
e313afe0 1317 type => 'boolean',
e1639957 1318 default => 0,
e313afe0
DM		 1319 optional => 1,
1320 },
1321 radv => {
1322 description => "Allow sending Router Advertisement.",
1323 type => 'boolean',
1324 optional => 1,
1325 },
1326 ipfilter => {
1327 description => "Enable default IP filters. " .
1328 "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1329 "for every interface. Such ipsets implicitly contain sane default " .
1330 "restrictions such as restricting IPv6 link local addresses to " .
1331 "the one derived from the interface's MAC address. For containers " .
1332 "the configured IP addresses will be implicitly added.",
1333 type => 'boolean',
1334 optional => 1,
1335 },
1336 policy_in => {
1337 description => "Input policy.",
1338 type => 'string',
1339 optional => 1,
1340 enum => ['ACCEPT', 'REJECT', 'DROP'],
1341 },
1342 policy_out => {
1343 description => "Output policy.",
1344 type => 'string',
1345 optional => 1,
1346 enum => ['ACCEPT', 'REJECT', 'DROP'],
1347 },
1348 log_level_in => get_standard_option('pve-fw-loglevel', {
1349 description => "Log level for incoming traffic." }),
1350 log_level_out => get_standard_option('pve-fw-loglevel', {
1351 description => "Log level for outgoing traffic." }),
1352
1353};
1354
fb060a52 1355
7a332151 1356my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
fb060a52 1357
7a332151 1358my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
fb060a52 1359
9c7e0858
DM		 1360my $rule_properties = {
1361 pos => {
1362 description => "Update rule at position <pos>.",
1363 type => 'integer',
1364 minimum => 0,
1365 optional => 1,
1366 },
c71e785f 1367 digest => get_standard_option('pve-config-digest'),
9c7e0858 1368 type => {
e50429af 1369 description => "Rule type.",
9c7e0858
DM		 1370 type => 'string',
1371 optional => 1,
1372 enum => ['in', 'out', 'group'],
1373 },
1374 action => {
c14dacdf 1375 description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
9c7e0858
DM		 1376 type => 'string',
1377 optional => 1,
44be8ceb 1378 pattern => $security_group_name_pattern,
c14dacdf
DM		 1379 maxLength => 20,
1380 minLength => 2,
9c7e0858 1381 },
e5076eee 1382 macro => {
e50429af 1383 description => "Use predefined standard macro.",
e5076eee
DM		 1384 type => 'string',
1385 optional => 1,
54cd19a8 1386 maxLength => 128,
e5076eee 1387 },
fb060a52 1388 iface => get_standard_option('pve-iface', {
7ccaa5f1 1389 description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
fb060a52
DM		 1390 optional => 1
1391 }),
9c7e0858 1392 source => {
fb060a52 1393 description => "Restrict packet source address. $addr_list_descr",
d31689ee 1394 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1395 optional => 1,
1396 },
1397 dest => {
fb060a52 1398 description => "Restrict packet destination address. $addr_list_descr",
d31689ee 1399 type => 'string', format => 'pve-fw-addr-spec',
9c7e0858
DM		 1400 optional => 1,
1401 },
1402 proto => {
fb060a52 1403 description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
54cd19a8 1404 type => 'string', format => 'pve-fw-protocol-spec',
9c7e0858
DM		 1405 optional => 1,
1406 },
1407 enable => {
e50429af 1408 description => "Flag to enable/disable a rule.",
72d055fc
AG		 1409 type => 'integer',
1410 minimum => 0,
9c7e0858
DM		 1411 optional => 1,
1412 },
3489f8a2
CE		 1413 log => get_standard_option('pve-fw-loglevel', {
1414 description => "Log level for firewall rule.",
1415 }),
9c7e0858 1416 sport => {
fb060a52 1417 description => "Restrict TCP/UDP source port. $port_descr",
a1c04f71 1418 type => 'string', format => 'pve-fw-sport-spec',
9c7e0858
DM		 1419 optional => 1,
1420 },
1421 dport => {
fb060a52 1422 description => "Restrict TCP/UDP destination port. $port_descr",
a1c04f71 1423 type => 'string', format => 'pve-fw-dport-spec',
9c7e0858
DM		 1424 optional => 1,
1425 },
1426 comment => {
e50429af 1427 description => "Descriptive comment.",
9c7e0858
DM		 1428 type => 'string',
1429 optional => 1,
1430 },
1431};
1432
1433sub add_rule_properties {
1434 my ($properties) = @_;
1435
1436 foreach my $k (keys %$rule_properties) {
3655b01f
DM		 1437 my $h = $rule_properties->{$k};
1438 # copy data, so that we can modify later without side effects
1439 foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
9c7e0858 1440 }
cbb5d6f3 1441
9c7e0858
DM		 1442 return $properties;
1443}
1444
5b7974df
DM		 1445sub delete_rule_properties {
1446 my ($rule, $delete_str) = @_;
e34d0e58 1447
5b7974df
DM		 1448 foreach my $opt (PVE::Tools::split_list($delete_str)) {
1449 raise_param_exc({ 'delete' => "no such property ('$opt')"})
1450 if !defined($rule_properties->{$opt});
1451 raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1452 if $opt eq 'type' || $opt eq 'action';
1453 delete $rule->{$opt};
1454 }
1455
1456 return $rule;
1457}
1458
9a2745a0 1459my $apply_macro = sub {
35d1d6da 1460 my ($macro_name, $param, $verify, $ipversion) = @_;
9a2745a0
DM		 1461
1462 my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1463 die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1464
35d1d6da
DM		 1465 if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1466 $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1467 }
1468
21a18e53 1469 # skip macros which are specific to another ipversion
ff5d050e
AG		 1470 if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1471 return if $ipversion != $required;
1472 }
21a18e53 1473
9a2745a0
DM		 1474 my $rules = [];
1475
1476 foreach my $templ (@$macro_rules) {
1477 my $rule = {};
1478 my $param_used = {};
1479 foreach my $k (keys %$templ) {
1480 my $v = $templ->{$k};
1481 if ($v eq 'PARAM') {
1482 $v = $param->{$k};
1483 $param_used->{$k} = 1;
1484 } elsif ($v eq 'DEST') {
1485 $v = $param->{dest};
1486 $param_used->{dest} = 1;
1487 } elsif ($v eq 'SOURCE') {
1488 $v = $param->{source};
1489 $param_used->{source} = 1;
1490 }
1491
1492 if (!defined($v)) {
1493 my $msg = "missing parameter '$k' in macro '$macro_name'";
e34d0e58 1494 raise_param_exc({ macro => $msg }) if $verify;
9a2745a0
DM		 1495 die "$msg\n";
1496 }
1497 $rule->{$k} = $v;
1498 }
1499 foreach my $k (keys %$param) {
1500 next if $k eq 'macro';
1501 next if !defined($param->{$k});
1502 next if $param_used->{$k};
1503 if (defined($rule->{$k})) {
1504 if ($rule->{$k} ne $param->{$k}) {
1505 my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
e34d0e58 1506 raise_param_exc({ $k => $msg }) if $verify;
9a2745a0
DM		 1507 die "$msg\n";
1508 }
1509 } else {
1510 $rule->{$k} = $param->{$k};
1511 }
1512 }
1513 push @$rules, $rule;
1514 }
1515
1516 return $rules;
1517};
1518
b6b8e6ad
DM		 1519my $rule_env_iface_lookup = {
1520 'ct' => 1,
1521 'vm' => 1,
1522 'group' => 0,
1523 'cluster' => 1,
1524 'host' => 1,
1525};
1526
7ca36671 1527sub verify_rule {
a523e057 1528 my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
b6b8e6ad
DM		 1529
1530 my $allow_groups = $rule_env eq 'group' ? 0 : 1;
bfc488f6 1531
b6b8e6ad
DM		 1532 my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1533 die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
7ca36671 1534
a523e057
DM		 1535 my $errors = $rule->{errors} || {};
1536
6d9246e7 1537 my $error_count = 0;
7ca36671 1538
6d9246e7
DM		 1539 my $add_error = sub {
1540 my ($param, $msg) = @_;
d4cda423 1541 chomp $msg;
6d9246e7
DM		 1542 raise_param_exc({ $param => $msg }) if !$noerr;
1543 $error_count++;
1544 $errors->{$param} = $msg if !$errors->{$param};
1545 };
1546
eea9d2a1
DM		 1547 my $ipversion;
1548 my $set_ip_version = sub {
1549 my $vers = shift;
1550 if ($vers) {
1551 die "detected mixed ipv4/ipv6 adresses in rule\n"
1552 if $ipversion && ($vers != $ipversion);
1553 $ipversion = $vers;
1554 }
1555 };
1556
a523e057 1557 my $check_ipset_or_alias_property = sub {
ae029a88 1558 my ($name, $expected_ipversion) = @_;
a523e057
DM		 1559
1560 if (my $value = $rule->{$name}) {
1561 if ($value =~ m/^\+/) {
4dfe04e6 1562 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
bfc488f6 1563 &$add_error($name, "no such ipset '$1'")
a523e057 1564 if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
bfc488f6 1565
a523e057 1566 } else {
351052d1 1567 &$add_error($name, "invalid ipset name '$value'");
a523e057
DM		 1568 }
1569 } elsif ($value =~ m/^${ip_alias_pattern}$/){
1570 my $alias = lc($value);
bfc488f6 1571 &$add_error($name, "no such alias '$value'")
70e524eb 1572 if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
04f5088f 1573 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
70e524eb
AD		 1574 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1575
eea9d2a1 1576 &$set_ip_version($e->{ipversion});
a523e057
DM		 1577 }
1578 }
1579 };
1580
6d9246e7
DM		 1581 my $type = $rule->{type};
1582 my $action = $rule->{action};
bfc488f6 1583
6d9246e7
DM		 1584 &$add_error('type', "missing property") if !$type;
1585 &$add_error('action', "missing property") if !$action;
1586
1587 if ($type) {
1588 if ($type eq 'in' || $type eq 'out') {
1589 &$add_error('action', "unknown action '$action'")
1590 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1591 } elsif ($type eq 'group') {
1592 &$add_error('type', "security groups not allowed")
1593 if !$allow_groups;
1594 &$add_error('action', "invalid characters in security group name")
1595 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1596 } else {
1597 &$add_error('type', "unknown rule type '$type'");
1598 }
7ca36671 1599 }
e34d0e58 1600
dba740a9 1601 if ($rule->{iface}) {
bfc488f6 1602 &$add_error('type', "parameter -i not allowed for this rule type")
b6b8e6ad 1603 if !$allow_iface;
dba740a9 1604 eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
6d9246e7 1605 &$add_error('iface', $@) if $@;
fdefeeab 1606 if ($rule_env eq 'vm' || $rule_env eq 'ct') {
b6b8e6ad
DM		 1607 &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1608 if $rule->{iface} !~ m/^net(\d+)$/;
b6b8e6ad
DM		 1609 }
1610 }
7ca36671
DM		 1611
1612 if ($rule->{macro}) {
6d9246e7
DM		 1613 if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1614 $rule->{macro} = $preferred_name;
1615 } else {
1616 &$add_error('macro', "unknown macro '$rule->{macro}'");
1617 }
1618 }
1619
1620 if ($rule->{proto}) {
1621 eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1622 &$add_error('proto', $@) if $@;
041b9277
DM		 1623 &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1624 &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
6d9246e7 1625 }
7ca36671
DM		 1626
1627 if ($rule->{dport}) {
a1c04f71 1628 eval { parse_port_name_number_or_range($rule->{dport}, 1); };
6d9246e7 1629 &$add_error('dport', $@) if $@;
48e3963e 1630 my $proto = $rule->{proto};
6d9246e7 1631 &$add_error('proto', "missing property - 'dport' requires this property")
48e3963e
WB		 1632 if !$proto;
1633 &$add_error('dport', "protocol '$proto' does not support ports")
1634 if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1635 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
6d9246e7 1636 }
7ca36671
DM		 1637
1638 if ($rule->{sport}) {
a1c04f71 1639 eval { parse_port_name_number_or_range($rule->{sport}, 0); };
6d9246e7 1640 &$add_error('sport', $@) if $@;
48e3963e 1641 my $proto = $rule->{proto};
6d9246e7 1642 &$add_error('proto', "missing property - 'sport' requires this property")
48e3963e
WB		 1643 if !$proto;
1644 &$add_error('sport', "protocol '$proto' does not support ports")
1645 if !$PROTOCOLS_WITH_PORTS->{$proto};
7ca36671
DM		 1646 }
1647
1648 if ($rule->{source}) {
041b9277
DM		 1649 eval {
1650 my $source_ipversion = parse_address_list($rule->{source});
1651 &$set_ip_version($source_ipversion);
1652 };
6d9246e7 1653 &$add_error('source', $@) if $@;
ae029a88 1654 &$check_ipset_or_alias_property('source', $ipversion);
7ca36671
DM		 1655 }
1656
1657 if ($rule->{dest}) {
9e2205e5
DM		 1658 eval {
1659 my $dest_ipversion = parse_address_list($rule->{dest});
041b9277 1660 &$set_ip_version($dest_ipversion);
9e2205e5 1661 };
6d9246e7 1662 &$add_error('dest', $@) if $@;
ae029a88 1663 &$check_ipset_or_alias_property('dest', $ipversion);
7ca36671
DM		 1664 }
1665
35d1d6da
DM		 1666 $rule->{ipversion} = $ipversion if $ipversion;
1667
a523e057 1668 if ($rule->{macro} && !$error_count) {
35d1d6da 1669 eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
6d9246e7
DM		 1670 if (my $err = $@) {
1671 if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1672 my $eh = $err->{errors};
1673 foreach my $p (keys %$eh) {
1674 &$add_error($p, $eh->{$p});
1675 }
1676 } else {
1677 &$add_error('macro', "$err");
1678 }
1679 }
9a2745a0
DM		 1680 }
1681
6d9246e7
DM		 1682 $rule->{errors} = $errors if $error_count;
1683
7ca36671
DM		 1684 return $rule;
1685}
1686
9c7e0858
DM		 1687sub copy_rule_data {
1688 my ($rule, $param) = @_;
1689
1690 foreach my $k (keys %$rule_properties) {
1691 if (defined(my $v = $param->{$k})) {
1692 if ($v eq '' || $v eq '-') {
1693 delete $rule->{$k};
1694 } else {
1695 $rule->{$k} = $v;
1696 }
9c7e0858
DM		 1697 }
1698 }
7ca36671 1699
9c7e0858
DM		 1700 return $rule;
1701}
1702
9f6845cf
DM		 1703sub rules_modify_permissions {
1704 my ($rule_env) = @_;
1705
1706 if ($rule_env eq 'host') {
1707 return {
1708 check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1709 };
1710 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1711 return {
1712 check => ['perm', '/', [ 'Sys.Modify' ]],
1713 };
3b4882dc 1714 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1715 return {
1716 check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1717 }
1718 }
1719
1720 return undef;
1721}
1722
1723sub rules_audit_permissions {
1724 my ($rule_env) = @_;
1725
1726 if ($rule_env eq 'host') {
1727 return {
1728 check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1729 };
1730 } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1731 return {
1732 check => ['perm', '/', [ 'Sys.Audit' ]],
1733 };
3b4882dc 1734 } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
9f6845cf
DM		 1735 return {
1736 check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1737 }
1738 }
1739
1740 return undef;
1741}
1742
9c7e0858 1743# core functions
780bcc0f
DM		 1744my $bridge_firewall_enabled = 0;
1745
1746sub enable_bridge_firewall {
1747
1748 return if $bridge_firewall_enabled; # only once
1749
5f0a912c
DM		 1750 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1751 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
780bcc0f 1752
6a8a75db
DM		 1753 # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1754 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1755
780bcc0f
DM		 1756 $bridge_firewall_enabled = 1;
1757}
1758
b16e818e 1759sub iptables_restore_cmdlist {
64e0adf4 1760 my ($cmdlist, $table) = @_;
3a616aa0 1761
64e0adf4
AD		 1762 $table = 'filter' if !$table;
1763 run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
3a616aa0
AD		 1764}
1765
17da5c0f 1766sub ip6tables_restore_cmdlist {
64e0adf4 1767 my ($cmdlist, $table) = @_;
17da5c0f 1768
64e0adf4
AD		 1769 $table = 'filter' if !$table;
1770 run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
17da5c0f
AD		 1771}
1772
34cdedfa
AD		 1773sub ipset_restore_cmdlist {
1774 my ($cmdlist) = @_;
1775
bb6ebf3b 1776 run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
34cdedfa
AD		 1777}
1778
151c209e
AD		 1779sub ebtables_restore_cmdlist {
1780 my ($cmdlist) = @_;
1781
c1031ab1 1782 run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
151c209e
AD		 1783}
1784
de2a57cd 1785sub iptables_get_chains {
64e0adf4 1786 my ($iptablescmd, $t) = @_;
17da5c0f
AD		 1787
1788 $iptablescmd = "iptables" if !$iptablescmd;
64e0adf4 1789 $t = 'filter' if !$t;
de2a57cd
DM		 1790
1791 my $res = {};
1792
1793 # check what chains we want to track
1794 my $is_pvefw_chain = sub {
1795 my $name = shift;
1796
dec84fcd
DM		 1797 return 1 if $name =~ m/^PVEFW-\S+$/;
1798
a3ded5cd 1799 return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
954f24b1 1800
a3ded5cd 1801 return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
954f24b1 1802
a3ded5cd 1803 return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
a89dfcc6 1804 return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
de2a57cd
DM		 1805
1806 return undef;
1807 };
1808
1809 my $table = '';
1810
c4a2e5ae
DM		 1811 my $hooks = {};
1812
de2a57cd
DM		 1813 my $parser = sub {
1814 my $line = shift;
1815
1816 return if $line =~ m/^#/;
1817 return if $line =~ m/^\s*$/;
1818
1819 if ($line =~ m/^\*(\S+)$/) {
1820 $table = $1;
1821 return;
1822 }
1823
64e0adf4 1824 return if $table ne $t;
de2a57cd
DM		 1825
1826 if ($line =~ m/^:(\S+)\s/) {
1827 my $chain = $1;
1828 return if !&$is_pvefw_chain($chain);
3fa83edf 1829 $res->{$chain} = "unknown";
09d5f68e 1830 } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
3fa83edf 1831 my ($chain, $sig) = ($1, $2);
de2a57cd 1832 return if !&$is_pvefw_chain($chain);
3fa83edf 1833 $res->{$chain} = $sig;
64e0adf4 1834 } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
c4a2e5ae 1835 $hooks->{$1} = 1;
de2a57cd
DM		 1836 } else {
1837 # simply ignore the rest
1838 return;
1839 }
1840 };
1841
c1031ab1 1842 run_command(["$iptablescmd-save"], outfunc => $parser);
de2a57cd 1843
c4a2e5ae 1844 return wantarray ? ($res, $hooks) : $res;
de2a57cd
DM		 1845}
1846
9bf7d929
DM		 1847sub iptables_chain_digest {
1848 my ($rules) = @_;
1849 my $digest = Digest::SHA->new('sha1');
1850 foreach my $rule (@$rules) { # order is important
1851 $digest->add($rule);
1852 }
1853 return $digest->b64digest;
1854}
1855
3f95d14a
DM		 1856sub ipset_chain_digest {
1857 my ($rules) = @_;
4bd0a9c4 1858
3f95d14a
DM		 1859 my $digest = Digest::SHA->new('sha1');
1860 foreach my $rule (sort @$rules) { # note: sorted
1861 $digest->add($rule);
1862 }
1863 return $digest->b64digest;
1864}
1865
34cdedfa
AD		 1866sub ipset_get_chains {
1867
1868 my $res = {};
1869 my $chains = {};
1870
1871 my $parser = sub {
1872 my $line = shift;
1873
1874 return if $line =~ m/^#/;
1875 return if $line =~ m/^\s*$/;
4b96e877 1876 if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
81a0bf43
DM		 1877 my $chain = $1;
1878 $line =~ s/\s+$//; # delete trailing white space
1879 push @{$chains->{$chain}}, $line;
34cdedfa
AD		 1880 } else {
1881 # simply ignore the rest
1882 return;
1883 }
1884 };
1885
c1031ab1 1886 run_command(['ipset', 'save'], outfunc => $parser);
34cdedfa 1887
3f95d14a
DM		 1888 # compute digest for each chain
1889 foreach my $chain (keys %$chains) {
1890 $res->{$chain} = ipset_chain_digest($chains->{$chain});
34cdedfa
AD		 1891 }
1892
1893 return $res;
1894}
1895
151c209e
AD		 1896sub ebtables_get_chains {
1897
1898 my $res = {};
1899 my $chains = {};
151c209e
AD		 1900 my $parser = sub {
1901 my $line = shift;
1902 return if $line =~ m/^#/;
1903 return if $line =~ m/^\s*$/;
fc1f1de9
WB		 1904 if ($line =~ m/^:(\S+)\s\S+$/) {
1905 # Make sure we know chains exist even if they're empty.
1906 $chains->{$1} //= [];
84025e99 1907 } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
151c209e
AD		 1908 my $chain = $1;
1909 $line =~ s/\s+$//;
1910 push @{$chains->{$chain}}, $line;
1911 } else {
1912 # simply ignore the rest
1913 return;
1914 }
1915 };
1916
c1031ab1 1917 run_command(['ebtables-save'], outfunc => $parser);
84025e99 1918 # compute digest for each chain and store rules as well
151c209e 1919 foreach my $chain (keys %$chains) {
84025e99
SI		 1920 $res->{$chain}->{rules} = $chains->{$chain};
1921 $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
151c209e
AD		 1922 }
1923 return $res;
1924}
1925
180da76c
TW		 1926# substitude action of rule according to action hash
1927sub rule_substitude_action {
1928 my ($rule, $actions) = @_;
1929
1930 if (my $action = $rule->{action}) {
1931 $rule->{action} = $actions->{$action} if defined($actions->{$action});
1932 }
1933}
1934
a44cb745
TW		 1935# generate a src or dst match
1936# $dir(ection) is either d or s
1937sub ipt_gen_src_or_dst_match {
1938 my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1939
1940 my $srcdst;
1941 if ($dir eq 's') {
1942 $srcdst = "src";
1943 } elsif ($dir eq 'd') {
1944 $srcdst = "dst";
1945 } else {
1946 die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1947 }
1948
1949 my $match;
1950 if ($adr =~ m/^\+/) {
1951 if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1952 my $name = $1;
1953 my $ipset_chain;
1954 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1955 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1956 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1957 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1958 } else {
1959 die "no such ipset '$name'\n";
1960 }
1961 $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1962 } else {
1963 die "invalid security group name '$adr'\n";
1964 }
1965 } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1966 my $alias = lc($adr);
1967 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1968 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1969 die "no such alias '$adr'\n" if !$e;
1970 $match = "-${dir} $e->{cidr}";
1971 } elsif ($adr =~ m/\-/){
1972 $match = "-m iprange --${srcdst}-range $adr";
1973 } else {
1974 $match = "-${dir} $adr";
1975 }
1976
1977 return $match;
1978}
1979
30c390f9
TW		 1980# convert a %rule to an array of iptables commands
1981sub ipt_rule_to_cmds {
1982 my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1983
1984 die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1985
1986 my @match = ();
1987
1988 if (defined $rule->{match}) {
1989 push @match, $rule->{match};
1990 } else {
1991 push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1992 push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1993
1994 if ($rule->{source}) {
1995 push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1996 }
1997 if ($rule->{dest}) {
1998 push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1999 }
2000
2001 if (my $proto = $rule->{proto}) {
2002 push @match, "-p $proto";
2003
f776d6de
WB		 2004 my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
2005 my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
30c390f9 2006
f776d6de
WB		 2007 my $add_dport = sub {
2008 return if !$rule->{dport};
3dffed4c 2009
30c390f9
TW		 2010 if ($proto eq 'icmp') {
2011 # Note: we use dport to store --icmp-type
2012 die "unknown icmp-type '$rule->{dport}'\n"
2013 if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2014 push @match, "-m icmp --icmp-type $rule->{dport}";
2015 } elsif ($proto eq 'icmpv6') {
2016 # Note: we use dport to store --icmpv6-type
2017 die "unknown icmpv6-type '$rule->{dport}'\n"
2018 if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2019 push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2020 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2021 die "protocol $proto does not have ports\n";
f776d6de
WB		 2022 } elsif ($multidport) {
2023 push @match, "--match multiport", "--dports $rule->{dport}";
30c390f9 2024 } else {
f776d6de 2025 push @match, "--dport $rule->{dport}";
30c390f9 2026 }
f776d6de 2027 };
30c390f9 2028
f776d6de
WB		 2029 my $add_sport = sub {
2030 return if !$rule->{sport};
3dffed4c 2031
30c390f9
TW		 2032 die "protocol $proto does not have ports\n"
2033 if !$PROTOCOLS_WITH_PORTS->{$proto};
f776d6de
WB		 2034 if ($multisport) {
2035 push @match, "--match multiport", "--sports $rule->{sport}";
30c390f9
TW		 2036 } else {
2037 push @match, "--sport $rule->{sport}";
2038 }
f776d6de
WB		 2039 };
2040
3dffed4c 2041 # order matters - single port before multiport!
f776d6de
WB		 2042 $add_dport->() if $multisport;
2043 $add_sport->();
2044 $add_dport->() if !$multisport;
30c390f9
TW		 2045 } elsif ($rule->{dport} || $rule->{sport}) {
2046 die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2047 die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2048 }
2049
2050 push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2051 }
2052 my $matchstr = scalar(@match) ? join(' ', @match) : "";
2053
2054 my $targetstr;
2055 if (defined $rule->{target}) {
2056 $targetstr = $rule->{target};
2057 } else {
2058 my $action = (defined $rule->{action}) ? $rule->{action} : "";
2059 my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2060 $targetstr = ($goto) ? "-g $action" : "-j $action";
2061 }
2062
2063 my @iptcmds;
2db2b6aa
TL		 2064 my $log = $rule->{log};
2065 if (defined($log) && $log ne 'nolog') {
3489f8a2
CE		 2066 my $loglevel = $log_level_hash->{$log};
2067 my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
30c390f9
TW		 2068 push @iptcmds, "-A $chain $matchstr $logaction";
2069 }
2070 push @iptcmds, "-A $chain $matchstr $targetstr";
2071 return @iptcmds;
2072}
2073
eba0fb64 2074sub ruleset_generate_rule {
3489f8a2 2075 my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
eba0fb64 2076
e5076eee
DM		 2077 my $rules;
2078
2079 if ($rule->{macro}) {
35d1d6da 2080 $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
e5076eee
DM		 2081 } else {
2082 $rules = [ $rule ];
2083 }
2084
30c390f9
TW		 2085 # update all or nothing
2086 my @ipt_rule_cmds;
2087 foreach my $r (@$rules) {
3489f8a2 2088 push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
30c390f9
TW		 2089 }
2090 foreach my $c (@ipt_rule_cmds) {
2091 ruleset_add_ipt_cmd($ruleset, $chain, $c);
2092 }
2093}
2094
3fa83edf
DM		 2095sub ruleset_create_chain {
2096 my ($ruleset, $chain) = @_;
3a616aa0 2097
d050c724 2098 die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
782c4cde 2099 die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
d050c724 2100
3fa83edf
DM		 2101 die "chain '$chain' already exists\n" if $ruleset->{$chain};
2102
2103 $ruleset->{$chain} = [];
3a616aa0
AD		 2104}
2105
3fa83edf
DM		 2106sub ruleset_chain_exist {
2107 my ($ruleset, $chain) = @_;
3a616aa0 2108
3fa83edf
DM		 2109 return $ruleset->{$chain} ? 1 : undef;
2110}
3a616aa0 2111
30c390f9
TW		 2112# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2113sub ruleset_add_ipt_cmd {
2114 my ($ruleset, $chain, $iptcmd) = @_;
2115
2116 die "no such chain '$chain'\n" if !$ruleset->{$chain};
2117
2118 push @{$ruleset->{$chain}}, $iptcmd;
2119}
2120
1e9c5070 2121sub ruleset_addrule {
3489f8a2 2122 my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
1e9c5070 2123
3489f8a2 2124 die "no such chain '$chain'\n" if !$ruleset->{$chain};
1e9c5070 2125
3489f8a2
CE		 2126 if ($log) {
2127 my $loglevel = $log_level_hash->{$log};
2128 my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
7f7930f8 2129 push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
3489f8a2
CE		 2130 }
2131 # for stable ebtables digests avoid double-spaces to match ebtables-save output
2132 $match .= ' ' if length($match);
2133 push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
1e9c5070
TW		 2134}
2135
3fa83edf 2136sub ruleset_insertrule {
1e9c5070 2137 my ($ruleset, $chain, $match, $action, $log) = @_;
3a616aa0 2138
3fa83edf 2139 die "no such chain '$chain'\n" if !$ruleset->{$chain};
3a616aa0 2140
1e9c5070 2141 unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
3fa83edf 2142}
3a616aa0 2143
782c4cde
DM		 2144sub get_log_rule_base {
2145 my ($chain, $vmid, $msg, $loglevel) = @_;
cbb5d6f3 2146
782c4cde 2147 $vmid = 0 if !defined($vmid);
7f7930f8 2148 $msg = "" if !defined($msg);
782c4cde 2149
cc37e000
TL		 2150 my $rlimit = '';
2151 if (defined($global_log_ratelimit)) {
2152 $rlimit = "-m limit $global_log_ratelimit ";
2153 }
2154
cbb5d6f3 2155 # Note: we use special format for prefix to pass further
7f7930f8 2156 # info to log daemon (VMID, LOGLEVEL and CHAIN)
cc37e000 2157 return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
782c4cde
DM		 2158}
2159
ead850e8 2160sub ruleset_add_chain_policy {
88c26d5e 2161 my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
ead850e8
DM		 2162
2163 if ($policy eq 'ACCEPT') {
2164
180da76c
TW		 2165 my $rule = { action => 'ACCEPT' };
2166 rule_substitude_action($rule, { ACCEPT => $accept_action});
2167 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
ead850e8
DM		 2168
2169 } elsif ($policy eq 'DROP') {
2170
1e9c5070 2171 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
ead850e8 2172
7f7930f8 2173 ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
ead850e8 2174 } elsif ($policy eq 'REJECT') {
1e9c5070 2175 ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
ead850e8 2176
d8d4dd67 2177 ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
ead850e8
DM		 2178 } else {
2179 # should not happen
2180 die "internal error: unknown policy '$policy'";
2181 }
2182}
2183
a83abe93 2184sub ruleset_chain_add_ndp {
e8415920 2185 my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
a83abe93
WB		 2186 return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2187
1e9c5070 2188 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
d7aa51ac 2189 if ($direction ne 'OUT' || $options->{radv}) {
1e9c5070 2190 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
d7aa51ac 2191 }
1e9c5070
TW		 2192 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2193 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
a83abe93
WB		 2194}
2195
e2943485 2196sub ruleset_chain_add_conn_filters {
27c49e25 2197 my ($ruleset, $chain, $allow_invalid, $accept) = @_;
e2943485 2198
27c49e25
CE		 2199 if (!$allow_invalid) {
2200 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2201 }
1e9c5070 2202 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
e2943485
DM		 2203}
2204
2205sub ruleset_chain_add_input_filters {
88c26d5e 2206 my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2428e394
AD		 2207
2208 if ($cluster_conf->{ipset}->{blacklist}){
b5831a0d
AD		 2209 if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2210 ruleset_create_chain($ruleset, "PVEFW-blacklist");
3489f8a2 2211 ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
b5831a0d 2212 }
88c26d5e 2213 my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1e9c5070 2214 ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2428e394 2215 }
e2943485
DM		 2216
2217 if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
5b5c42b1 2218 if ($ipversion == 4) {
1e9c5070 2219 ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
5b5c42b1 2220 }
e2943485
DM		 2221 }
2222
2223 if ($options->{tcpflags}) {
1e9c5070 2224 ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
e2943485
DM		 2225 }
2226}
2227
9e15114a 2228sub ruleset_create_vm_chain {
88c26d5e 2229 my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
3a616aa0 2230
9e15114a 2231 ruleset_create_chain($ruleset, $chain);
b47ecc88 2232 my $accept = generate_nfqueue($options);
3a616aa0 2233
ce15d90b 2234 if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
dcafc5fb
WB		 2235 if ($ipversion == 4) {
2236 if ($direction eq 'OUT') {
2237 ruleset_generate_rule($ruleset, $chain, $ipversion,
2238 { action => 'PVEFW-SET-ACCEPT-MARK',
2239 proto => 'udp', sport => 68, dport => 67 });
2240 } else {
2241 ruleset_generate_rule($ruleset, $chain, $ipversion,
2242 { action => 'ACCEPT',
2243 proto => 'udp', sport => 67, dport => 68 });
2244 }
2245 } elsif ($ipversion == 6) {
2246 if ($direction eq 'OUT') {
2247 ruleset_generate_rule($ruleset, $chain, $ipversion,
2248 { action => 'PVEFW-SET-ACCEPT-MARK',
2249 proto => 'udp', sport => 546, dport => 547 });
2250 } else {
2251 ruleset_generate_rule($ruleset, $chain, $ipversion,
2252 { action => 'ACCEPT',
2253 proto => 'udp', sport => 547, dport => 546 });
2254 }
76a2d1e7 2255 }
dcafc5fb 2256
ce15d90b
DM		 2257 }
2258
b21aca2c
DM		 2259 if ($direction eq 'OUT') {
2260 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1e9c5070 2261 ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
b21aca2c 2262 }
d7aa51ac 2263 if ($ipversion == 6 && !$options->{radv}) {
1e9c5070 2264 ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
d7aa51ac 2265 }
808d711d 2266 if ($ipfilter_ipset) {
1e9c5070 2267 ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
808d711d 2268 }
1e9c5070 2269 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
c29f55c9 2270 }
e8415920
WB		 2271
2272 my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2273 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
9e15114a
DM		 2274}
2275
4bc6b5ac 2276sub ruleset_add_group_rule {
aedde2c2 2277 my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
4bc6b5ac
DM		 2278
2279 my $group = $rule->{action};
2280 my $group_chain = "GROUP-$group-$direction";
2281 if(!ruleset_chain_exist($ruleset, $group_chain)){
aedde2c2 2282 generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
4bc6b5ac 2283 }
bfc488f6 2284
f8b12fff 2285 if ($direction eq 'OUT' && $rule->{iface_out}) {
1e9c5070 2286 ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
f8b12fff 2287 } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1e9c5070 2288 ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
4bc6b5ac 2289 } else {
1e9c5070 2290 ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
4bc6b5ac
DM		 2291 }
2292
1e9c5070 2293 ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
4bc6b5ac
DM		 2294}
2295
9e15114a 2296sub ruleset_generate_vm_rules {
3489f8a2 2297 my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
9e15114a
DM		 2298
2299 my $lc_direction = lc($direction);
c29f55c9 2300
6b8ca015
DM		 2301 my $in_accept = generate_nfqueue($options);
2302
92e976b3
DM		 2303 foreach my $rule (@$rules) {
2304 next if $rule->{iface} && $rule->{iface} ne $netid;
b7ab6989 2305 next if !$rule->{enable} || $rule->{errors};
006490cb 2306 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
84870b1a 2307
92e976b3 2308 if ($rule->{type} eq 'group') {
4bc6b5ac 2309 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
aedde2c2 2310 $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
92e976b3
DM		 2311 } else {
2312 next if $rule->{type} ne $lc_direction;
921dfb33 2313 eval {
3489f8a2 2314 $rule->{logmsg} = "$rule->{action}: ";
921dfb33 2315 if ($direction eq 'OUT') {
180da76c 2316 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
3489f8a2 2317 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33 2318 } else {
180da76c 2319 rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
3489f8a2 2320 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
921dfb33
DM		 2321 }
2322 };
2323 warn $@ if $@;
4e6112f9 2324 }
3a616aa0 2325 }
9e15114a
DM		 2326}
2327
b47ecc88
AD		 2328sub generate_nfqueue {
2329 my ($options) = @_;
2330
73089769
DM		 2331 if ($options->{ips}) {
2332 my $action = "NFQUEUE";
2333 if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2334 if (defined($3) && defined($1)) {
b47ecc88 2335 $action .= " --queue-balance $1:$3";
73089769 2336 } elsif (defined($1)) {
b47ecc88
AD		 2337 $action .= " --queue-num $1";
2338 }
2339 }
8dc92812 2340 $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
73089769
DM		 2341 return $action;
2342 } else {
2343 return "ACCEPT";
b47ecc88 2344 }
b47ecc88
AD		 2345}
2346
da6fc60b 2347sub ruleset_generate_vm_ipsrules {
a01c32c7 2348 my ($ruleset, $options, $direction, $iface) = @_;
da6fc60b
AD		 2349
2350 if ($options->{ips} && $direction eq 'IN') {
2351 my $nfqueue = generate_nfqueue($options);
2352
a01c32c7 2353 if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
da6fc60b
AD		 2354 ruleset_create_chain($ruleset, "PVEFW-IPS");
2355 }
2356
1e9c5070 2357 ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
da6fc60b
AD		 2358 }
2359}
2360
9e15114a 2361sub generate_tap_rules_direction {
84870b1a 2362 my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
9e15114a
DM		 2363
2364 my $lc_direction = lc($direction);
2365
2366 my $rules = $vmfw_conf->{rules};
2367
2368 my $options = $vmfw_conf->{options};
2369 my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2370
2371 my $tapchain = "$iface-$direction";
2372
b692f42c 2373 my $ipfilter_name = compute_ipfilter_ipset_name($netid);
88c26d5e 2374 my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
74601077 2375 if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
808d711d 2376
a34cfdd0 2377 if ($options->{enable}) {
033a15b3
ML		 2378 # create chain with mac and ip filter
2379 ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2380
3489f8a2 2381 ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
3a616aa0 2382
a34cfdd0 2383 ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
da6fc60b 2384
a34cfdd0
DM		 2385 # implement policy
2386 my $policy;
ccae0b50 2387
a34cfdd0
DM		 2388 if ($direction eq 'OUT') {
2389 $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2390 } else {
76448f08 2391 $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
a34cfdd0 2392 }
ccae0b50 2393
a34cfdd0
DM		 2394 my $accept = generate_nfqueue($options);
2395 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
88c26d5e 2396 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
a34cfdd0
DM		 2397 } else {
2398 my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
88c26d5e 2399 ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
a34cfdd0 2400 }
3a616aa0 2401
3fa83edf 2402 # plug the tap chain to bridge chain
3cc81077 2403 if ($direction eq 'IN') {
a01c32c7 2404 ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
8f3aa9cc 2405 "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
3cc81077 2406 } else {
a01c32c7 2407 ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
8f3aa9cc 2408 "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
3cc81077 2409 }
3a616aa0
AD		 2410}
2411
d18c1e2b 2412sub enable_host_firewall {
06208a01 2413 my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
0bd5f137 2414
92e976b3 2415 my $options = $hostfw_conf->{options};
63324b09 2416 my $cluster_options = $cluster_conf->{options};
92e976b3 2417 my $rules = $hostfw_conf->{rules};
35f0c37e 2418 my $cluster_rules = $cluster_conf->{rules};
178a63be 2419
06208a01
SR		 2420 # corosync preparation
2421 my $corosync_rule = "-p udp --dport 5404:5405";
2422 my $corosync_local_addresses = {};
eacd4748 2423 my $multicast_enabled;
06208a01
SR		 2424 my $local_hostname = PVE::INotify::nodename();
2425 if (defined($corosync_conf)) {
2426 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2427 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2428
2429 if ($node_name eq $local_hostname) {
2430 $corosync_local_addresses->{$key} = $node_ip;
2431 }
2432 });
eacd4748
SR		 2433
2434 # allow multicast only if enabled in config
81a0a9ff
FG		 2435 my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2436 $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
06208a01
SR		 2437 }
2438
3fa83edf 2439 # host inbound firewall
dec84fcd
DM		 2440 my $chain = "PVEFW-HOST-IN";
2441 ruleset_create_chain($ruleset, $chain);
0bd5f137 2442
178a63be
DM		 2443 my $loglevel = get_option_log_level($options, "log_level_in");
2444
1e9c5070 2445 ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
4ac863a6 2446
27c49e25 2447 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e8415920 2448 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
88c26d5e 2449 ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
fb424a00 2450
23e888f8
DM		 2451 # we use RETURN because we need to check also tap rules
2452 my $accept_action = 'RETURN';
2453
1e9c5070 2454 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2455
35f0c37e
DM		 2456 # add host rules first, so that cluster wide rules can be overwritten
2457 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2458 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2459 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
bfc488f6 2460
f8b12fff 2461 $rule->{iface_in} = $rule->{iface} if $rule->{iface};
5383df39 2462
1a9978ed
DM		 2463 eval {
2464 if ($rule->{type} eq 'group') {
aedde2c2 2465 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
1a9978ed 2466 } elsif ($rule->{type} eq 'in') {
180da76c 2467 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2468 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2469 }
2470 };
2471 warn $@ if $@;
f8b12fff 2472 delete $rule->{iface_in};
0bd5f137 2473 }
eb399cef
DM		 2474
2475 # allow standard traffic for management ipset (includes cluster network)
88c26d5e 2476 my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
708ba714 2477 my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1e9c5070
TW		 2478 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
2479 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2480 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
2481 ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
bfc488f6 2482
06208a01
SR		 2483 # corosync inbound rules
2484 if (defined($corosync_conf)) {
eacd4748
SR		 2485 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2486 if $multicast_enabled;
3bc79f87 2487
06208a01
SR		 2488 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2489 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2490 my $destination = $corosync_local_addresses->{$key};
06208a01 2491
a9c463ce 2492 if ($node_name ne $local_hostname && defined($destination)) {
06208a01 2493 # accept only traffic on same ring
a9c463ce 2494 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2495 }
2496 });
3bc79f87 2497 }
0bd5f137 2498
23e888f8 2499 # implement input policy
63324b09 2500 my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
88c26d5e 2501 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
0bd5f137 2502
3fa83edf 2503 # host outbound firewall
aadd745e 2504 $chain = "PVEFW-HOST-OUT";
dec84fcd
DM		 2505 ruleset_create_chain($ruleset, $chain);
2506
178a63be
DM		 2507 $loglevel = get_option_log_level($options, "log_level_out");
2508
1e9c5070 2509 ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
e2943485 2510
27c49e25 2511 ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
e2943485 2512
23e888f8
DM		 2513 # we use RETURN because we may want to check other thigs later
2514 $accept_action = 'RETURN';
e8415920 2515 ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
23e888f8 2516
1e9c5070 2517 ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
cc8dc02f 2518
35f0c37e
DM		 2519 # add host rules first, so that cluster wide rules can be overwritten
2520 foreach my $rule (@$rules, @$cluster_rules) {
5383df39 2521 next if !$rule->{enable} || $rule->{errors};
35d1d6da 2522 next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
5383df39 2523
f8b12fff 2524 $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1a9978ed 2525 eval {
3489f8a2 2526 $rule->{logmsg} = "$rule->{action}: ";
1a9978ed 2527 if ($rule->{type} eq 'group') {
aedde2c2 2528 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
1a9978ed 2529 } elsif ($rule->{type} eq 'out') {
180da76c 2530 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
3489f8a2 2531 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
1a9978ed
DM		 2532 }
2533 };
2534 warn $@ if $@;
f8b12fff 2535 delete $rule->{iface_out};
0bd5f137
AD		 2536 }
2537
3bc79f87 2538 # allow standard traffic on cluster network
06208a01
SR		 2539 my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2540 my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2541
35d1d6da 2542 if ($localnet && ($ipversion == $localnet_ver)) {
1e9c5070
TW		 2543 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
2544 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
2545 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
2546 ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
06208a01 2547 }
bfc488f6 2548
06208a01
SR		 2549 # corosync outbound rules
2550 if (defined($corosync_conf)) {
eacd4748
SR		 2551 ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2552 if $multicast_enabled;
06208a01
SR		 2553
2554 PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2555 my ($node_name, $node_ip, $node_ipversion, $key) = @_;
a9c463ce 2556 my $source = $corosync_local_addresses->{$key};
06208a01 2557
a9c463ce 2558 if ($node_name ne $local_hostname && defined($source)) {
06208a01 2559 # accept only traffic on same ring
a9c463ce 2560 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
06208a01
SR		 2561 }
2562 });
3bc79f87
DM		 2563 }
2564
23e888f8 2565 # implement output policy
63324b09 2566 $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
88c26d5e 2567 ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
6158271d 2568
1e9c5070
TW		 2569 ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2570 ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
9d31b418
AD		 2571}
2572
2573sub generate_group_rules {
aedde2c2 2574 my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
9d31b418 2575
c6f5cc88 2576 my $rules = $cluster_conf->{groups}->{$group};
6158271d 2577
b4deedab
DM		 2578 if (!$rules) {
2579 warn "no such security group '$group'\n";
2580 $rules = []; # create empty chain
2581 }
2582
3fa83edf 2583 my $chain = "GROUP-${group}-IN";
9d31b418 2584
3fa83edf 2585 ruleset_create_chain($ruleset, $chain);
1e9c5070 2586 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2587
92e976b3
DM		 2588 foreach my $rule (@$rules) {
2589 next if $rule->{type} ne 'in';
7a5a402b 2590 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2591 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
180da76c 2592 rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2dc0a26e 2593 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418
AD		 2594 }
2595
3fa83edf 2596 $chain = "GROUP-${group}-OUT";
9d31b418 2597
3fa83edf 2598 ruleset_create_chain($ruleset, $chain);
1e9c5070 2599 ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
9d31b418 2600
92e976b3
DM		 2601 foreach my $rule (@$rules) {
2602 next if $rule->{type} ne 'out';
7a5a402b 2603 next if !$rule->{enable} || $rule->{errors};
aedde2c2 2604 next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
92e976b3
DM		 2605 # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2606 # check also other tap rules later
180da76c 2607 rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2dc0a26e 2608 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
9d31b418 2609 }
9d31b418
AD		 2610}
2611
51bae274
DM		 2612my $MAX_NETS = 32;
2613my $valid_netdev_names = {};
2614for (my $i = 0; $i < $MAX_NETS; $i++) {
2615 $valid_netdev_names->{"net$i"} = 1;
2616}
5e1267a5 2617
fe3d79b4
WB		 2618sub get_mark_values {
2619 my ($value, $mask) = @_;
2620 $value = hex($value) if $value =~ /^0x/;
2621 $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2622 $mask = 0xffffffff if !defined($mask);
2623 return ($value, $mask);
2624}
2625
51bae274 2626sub parse_fw_rule {
40af93c4 2627 my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
5e1267a5 2628
d4cda423
DM		 2629 my $orig_line = $line;
2630
6d9246e7
DM		 2631 my $rule = {};
2632
11bac5c2 2633 # we can add single line comments to the end of the rule
6d9246e7
DM		 2634 if ($line =~ s/#\s*(.*?)\s*$//) {
2635 $rule->{comment} = decode('utf8', $1);
2636 }
11bac5c2
DM		 2637
2638 # we can disable a rule when prefixed with '|'
ea9e5116 2639
6d9246e7 2640 $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
51bae274 2641
dba740a9
DM		 2642 $line =~ s/^(\S+)\s+(\S+)\s*// ||
2643 die "unable to parse rule: $line\n";
6d9246e7
DM		 2644
2645 $rule->{type} = lc($1);
2646 $rule->{action} = $2;
2647
2648 if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
2649 if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2650 $rule->{macro} = $1;
2651 $rule->{action} = $2;
92e976b3 2652 }
51bae274
DM		 2653 }
2654
dba740a9
DM		 2655 while (length($line)) {
2656 if ($line =~ s/^-i (\S+)\s*//) {
6d9246e7 2657 $rule->{iface} = $1;
dba740a9
DM		 2658 next;
2659 }
51bae274 2660
6d9246e7 2661 last if $rule->{type} eq 'group';
51bae274 2662
dba740a9 2663 if ($line =~ s/^-p (\S+)\s*//) {
6d9246e7 2664 $rule->{proto} = $1;
dba740a9
DM		 2665 next;
2666 }
6d9246e7 2667
dba740a9 2668 if ($line =~ s/^-dport (\S+)\s*//) {
6d9246e7 2669 $rule->{dport} = $1;
dba740a9
DM		 2670 next;
2671 }
6d9246e7 2672
dba740a9 2673 if ($line =~ s/^-sport (\S+)\s*//) {
6d9246e7 2674 $rule->{sport} = $1;
dba740a9
DM		 2675 next;
2676 }
2677 if ($line =~ s/^-source (\S+)\s*//) {
6d9246e7 2678 $rule->{source} = $1;
dba740a9
DM		 2679 next;
2680 }
2681 if ($line =~ s/^-dest (\S+)\s*//) {
6d9246e7 2682 $rule->{dest} = $1;
dba740a9
DM		 2683 next;
2684 }
3489f8a2
CE		 2685 if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2686 $rule->{log} = $1;
2687 next;
2688 }
51bae274 2689
dba740a9
DM		 2690 last;
2691 }
ba791b1f 2692
dba740a9 2693 die "unable to parse rule parameters: $line\n" if length($line);
51bae274 2694
a523e057 2695 $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
eedcb564
WB		 2696 if ($rule->{errors}) {
2697 # The verbose flag really means we're running from the CLI and want
2698 # output on the console - in the other case we really want such errors
2699 # to go into the syslog instead.
2700 my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2701 $log->("$prefix - errors in rule parameters: $orig_line\n");
d4cda423 2702 foreach my $p (keys %{$rule->{errors}}) {
eedcb564 2703 $log->(" $p: $rule->{errors}->{$p}\n");
d4cda423
DM		 2704 }
2705 }
6d9246e7
DM		 2706
2707 return $rule;
51bae274
DM		 2708}
2709
c5e8b008
AD		 2710sub verify_ethertype {
2711 my ($value) = @_;
2712 my $types = get_etc_ethertypes();
2713 die "unknown ethernet protocol type: $value\n"
2714 if !defined($types->{byname}->{$value}) &&
2715 !defined($types->{byid}->{$value});
2716}
2717
2d404ffc 2718sub parse_vmfw_option {
85c6eaed
DM		 2719 my ($line) = @_;
2720
2721 my ($opt, $value);
2722
178a63be
DM		 2723 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2724
74601077 2725 if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
9c6b6efd
DM		 2726 $opt = lc($1);
2727 $value = int($2);
178a63be
DM		 2728 } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2729 $opt = lc($1);
2730 $value = $2 ? lc($3) : '';
72f63fde 2731 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
85c6eaed
DM		 2732 $opt = lc($1);
2733 $value = uc($3);
b47ecc88
AD		 2734 } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2735 $opt = lc($1);
2736 $value = $2;
c5e8b008
AD		 2737 } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2738 $opt = lc($1);
2739 $value = $2;
2740 verify_ethertype($_) foreach split(/\s*,\s*/, $value);
9c6b6efd 2741 } else {
85c6eaed
DM		 2742 die "can't parse option '$line'\n"
2743 }
2744
2745 return ($opt, $value);
2746}
2747
2d404ffc
DM		 2748sub parse_hostfw_option {
2749 my ($line) = @_;
2750
2751 my ($opt, $value);
2752
2753 my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2754
27c49e25 2755 if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2d404ffc
DM		 2756 $opt = lc($1);
2757 $value = int($2);
178a63be 2758 } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2d404ffc
DM		 2759 $opt = lc($1);
2760 $value = $2 ? lc($3) : '';
28c082a1 2761 } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
490cdead
DM		 2762 $opt = lc($1);
2763 $value = int($2);
2d404ffc 2764 } else {
2d404ffc
DM		 2765 die "can't parse option '$line'\n"
2766 }
2767
2768 return ($opt, $value);
2769}
2770
c6f5cc88
DM		 2771sub parse_clusterfw_option {
2772 my ($line) = @_;
2773
2774 my ($opt, $value);
2775
72d055fc 2776 if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
c6f5cc88
DM		 2777 $opt = lc($1);
2778 $value = int($2);
72d055fc
AG		 2779 if (($value > 1) && ((time() - $value) > 60)) {
2780 $value = 0
2781 }
2549e7ef 2782 } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
84025e99
SI		 2783 $opt = lc($1);
2784 $value = int($2);
63324b09
DM		 2785 } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2786 $opt = lc($1);
2787 $value = uc($3);
cc37e000
TL		 2788 } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2789 $opt = lc($1);
2790 $value = $2;
c6f5cc88 2791 } else {
c6f5cc88
DM		 2792 die "can't parse option '$line'\n"
2793 }
2794
2795 return ($opt, $value);
2796}
2797
6c221576
DM		 2798sub resolve_alias {
2799 my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2800
6d959e3f 2801 my $alias = lc($cidr);
04f5088f 2802 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
6d959e3f 2803 $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
6c221576 2804
6d959e3f
DM		 2805 die "no such alias '$cidr'\n" if !$e;;
2806
2807 return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
6c221576
DM		 2808}
2809
ae029a88
DM		 2810sub parse_ip_or_cidr {
2811 my ($cidr) = @_;
2812
2813 my $ipversion;
2814
2815 if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2816 $cidr =~ s|/128$||;
2817 $ipversion = 6;
2818 } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2819 $cidr =~ s|/32$||;
2820 $ipversion = 4;
2821 } else {
2822 die "value does not look like a valid IP address or CIDR network\n";
2823 }
2824
2825 return wantarray ? ($cidr, $ipversion) : $cidr;
2826}
2827
e76a9f53 2828sub parse_alias {
92e1209b
AD		 2829 my ($line) = @_;
2830
81d574a7
DM		 2831 # we can add single line comments to the end of the line
2832 my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2833
92e1209b 2834 if ($line =~ m/^(\S+)\s(\S+)$/) {
81d574a7 2835 my ($name, $cidr) = ($1, $2);
ae029a88
DM		 2836 my $ipversion;
2837
2838 ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2839
81d574a7
DM		 2840 my $data = {
2841 name => $name,
2842 cidr => $cidr,
70e524eb 2843 ipversion => $ipversion,
81d574a7
DM		 2844 };
2845 $data->{comment} = $comment if $comment;
2846 return $data;
92e1209b
AD		 2847 }
2848
81d574a7 2849 return undef;
92e1209b
AD		 2850}
2851
e5cd1ee0 2852sub generic_fw_config_parser {
585ede43
TL		 2853 my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2854
51bae274
DM		 2855 my $section;
2856 my $group;
2857
1210ae94 2858 my $res = $empty_conf;
6158271d 2859
0dbef530
TL		 2860 my $raw;
2861 if ($filename =~ m!^/etc/pve/(.*)$!) {
2862 $raw = PVE::Cluster::get_config($1);
2863 } else {
2864 $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2865 }
2866 return {} if !$raw;
2867
2868 my $linenr = 0;
2869 while ($raw =~ /^\h*(.*?)\h*$/gm) {
2870 my $line = $1;
2871 $linenr++;
51bae274
DM		 2872 next if $line =~ m/^#/;
2873 next if $line =~ m/^\s*$/;
c8c534f7
DM		 2874 chomp $line;
2875
961b4928
DM		 2876 my $prefix = "$filename (line $linenr)";
2877
1210ae94 2878 if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
c6f5cc88
DM		 2879 $section = 'options';
2880 next;
2881 }
2882
1210ae94 2883 if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
92e1209b
AD		 2884 $section = 'aliases';
2885 next;
2886 }
2887
1210ae94 2888 if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
c6f5cc88 2889 $section = 'groups';
92e976b3 2890 $group = lc($1);
0d22acb3 2891 my $comment = $2;
351052d1
DM		 2892 eval {
2893 die "security group name too long\n" if length($group) > $max_group_name_length;
2894 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2895 };
2896 if (my $err = $@) {
2897 ($section, $group, $comment) = undef;
2898 warn "$prefix: $err";
2899 next;
2900 }
2901
c85c87f9 2902 $res->{$section}->{$group} = [];
649e4d57
DM		 2903 $res->{group_comments}->{$group} = decode('utf8', $comment)
2904 if $comment;
51bae274
DM		 2905 next;
2906 }
34cdedfa 2907
1210ae94 2908 if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
c6f5cc88
DM		 2909 $section = 'rules';
2910 next;
2911 }
cbb5d6f3 2912
1210ae94 2913 if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
34cdedfa
AD		 2914 $section = 'ipset';
2915 $group = lc($1);
d72c631c 2916 my $comment = $2;
351052d1
DM		 2917 eval {
2918 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2919 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2920 };
2921 if (my $err = $@) {
2922 ($section, $group, $comment) = undef;
2923 warn "$prefix: $err";
2924 next;
2925 }
2926
c85c87f9 2927 $res->{$section}->{$group} = [];
e34d0e58 2928 $res->{ipset_comments}->{$group} = decode('utf8', $comment)
649e4d57 2929 if $comment;
34cdedfa
AD		 2930 next;
2931 }
2932
c6f5cc88 2933 if (!$section) {
cbb5d6f3 2934 warn "$prefix: skip line - no section\n";
51bae274
DM		 2935 next;
2936 }
2937
c6f5cc88
DM		 2938 if ($section eq 'options') {
2939 eval {
1210ae94
DM		 2940 my ($opt, $value);
2941 if ($rule_env eq 'cluster') {
2942 ($opt, $value) = parse_clusterfw_option($line);
2943 } elsif ($rule_env eq 'host') {
2944 ($opt, $value) = parse_hostfw_option($line);
2945 } else {
2946 ($opt, $value) = parse_vmfw_option($line);
2947 }
c6f5cc88
DM		 2948 $res->{options}->{$opt} = $value;
2949 };
2950 warn "$prefix: $@" if $@;
92e1209b
AD		 2951 } elsif ($section eq 'aliases') {
2952 eval {
e76a9f53 2953 my $data = parse_alias($line);
81d574a7 2954 $res->{aliases}->{lc($data->{name})} = $data;
92e1209b
AD		 2955 };
2956 warn "$prefix: $@" if $@;
c6f5cc88
DM		 2957 } elsif ($section eq 'rules') {
2958 my $rule;
40af93c4 2959 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
c6f5cc88
DM		 2960 if (my $err = $@) {
2961 warn "$prefix: $err";
2962 next;
2963 }
2964 push @{$res->{$section}}, $rule;
2965 } elsif ($section eq 'groups') {
34cdedfa 2966 my $rule;
40af93c4 2967 eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
34cdedfa
AD		 2968 if (my $err = $@) {
2969 warn "$prefix: $err";
2970 next;
2971 }
3f95d14a 2972 push @{$res->{$section}->{$group}}, $rule;
3f95d14a 2973 } elsif ($section eq 'ipset') {
9d6f90e6
DM		 2974 # we can add single line comments to the end of the rule
2975 my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2976
30f1b100 2977 $line =~ m/^(\!)?\s*(\S+)\s*$/;
2a052ee3 2978 my $nomatch = $1;
9d6f90e6 2979 my $cidr = $2;
d46b1ef6
DM		 2980 my $errors;
2981
2982 if ($nomatch && !$feature_ipset_nomatch) {
2983 $errors->{nomatch} = "nomatch not supported by kernel";
2984 }
2a052ee3 2985
4803b296
DM		 2986 eval {
2987 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2988 resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2989 } else {
ae029a88 2990 $cidr = parse_ip_or_cidr($cidr);
92e1209b 2991 }
4803b296
DM		 2992 };
2993 if (my $err = $@) {
c8c534f7 2994 chomp $err;
d46b1ef6 2995 $errors->{cidr} = $err;
2a052ee3 2996 }
2a052ee3 2997
b14db52f
WB		 2998 if ($cidr =~ m!/0+$!) {
2999 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3000 }
3001
e34d0e58 3002 my $entry = { cidr => $cidr };
9d6f90e6
DM		 3003 $entry->{nomatch} = 1 if $nomatch;
3004 $entry->{comment} = $comment if $comment;
d46b1ef6 3005 $entry->{errors} = $errors if $errors;
e34d0e58 3006
c8c534f7 3007 if ($verbose && $errors) {
9a3061c7 3008 warn "$prefix - errors in ipset '$group': $line\n";
c8c534f7
DM		 3009 foreach my $p (keys %{$errors}) {
3010 warn " $p: $errors->{$p}\n";
3011 }
3012 }
3013
9d6f90e6 3014 push @{$res->{$section}->{$group}}, $entry;
1210ae94
DM		 3015 } else {
3016 warn "$prefix: skip line - unknown section\n";
3017 next;
51bae274 3018 }
5e1267a5
DM		 3019 }
3020
3021 return $res;
3022}
3023
06320eb0
DM		 3024sub run_locked {
3025 my ($code, @param) = @_;
3026
3027 my $timeout = 10;
3028
3029 my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3030
3031 die $@ if $@;
3032
3033 return $res;
3034}
3035
5e1267a5
DM		 3036sub read_local_vm_config {
3037
5e1267a5 3038 my $qemu = {};
3b4882dc 3039 my $lxc = {};
5e1267a5 3040
fdefeeab 3041 my $vmdata = { qemu => $qemu, lxc => $lxc };
5e1267a5 3042
c8301d63
DM		 3043 my $vmlist = PVE::Cluster::get_vmlist();
3044 return $vmdata if !$vmlist || !$vmlist->{ids};
3045 my $ids = $vmlist->{ids};
3046
3047 foreach my $vmid (keys %$ids) {
3048 next if !$vmid; # skip VE0
3049 my $d = $ids->{$vmid};
3050 next if !$d->{node} || $d->{node} ne $nodename;
3051 next if !$d->{type};
fdefeeab 3052 if ($d->{type} eq 'qemu') {
d9fee004 3053 if ($have_qemu_server) {
b5a16dd3 3054 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
d9fee004
DM		 3055 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3056 $qemu->{$vmid} = $conf;
3057 }
c8301d63 3058 }
3b4882dc
AG		 3059 } elsif ($d->{type} eq 'lxc') {
3060 if ($have_lxc) {
a7c85d56 3061 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3b4882dc
AG		 3062 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3063 $lxc->{$vmid} = $conf;
3064 }
3065 }
3066 }
5e1267a5 3067 }
d9fee004 3068
5e1267a5
DM		 3069 return $vmdata;
3070};
3071
e7b35711 3072sub load_vmfw_conf {
40af93c4 3073 my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
e7b35711 3074
21053409 3075 $dir = $pvefw_conf_dir if !defined($dir);
8aef5177 3076 my $filename = "$dir/$vmid.fw";
585ede43
TL		 3077
3078 my $empty_conf = {
3079 rules => [],
3080 options => {},
3081 aliases => {},
3082 ipset => {} ,
3083 ipset_comments => {},
3084 };
3085
3086 my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3087 $vmfw_conf->{vmid} = $vmid;
e7b35711
DM		 3088
3089 return $vmfw_conf;
3090}
3091
464f933e 3092my $format_rules = sub {
dba740a9 3093 my ($rules, $allow_iface) = @_;
464f933e
DM		 3094
3095 my $raw = '';
3096
3097 foreach my $rule (@$rules) {
c14dacdf 3098 if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
464f933e
DM		 3099 $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3100 $raw .= uc($rule->{type});
7ca36671
DM		 3101 if ($rule->{macro}) {
3102 $raw .= " $rule->{macro}($rule->{action})";
3103 } else {
3104 $raw .= " " . $rule->{action};
3105 }
dba740a9
DM		 3106 if ($allow_iface && $rule->{iface}) {
3107 $raw .= " -i $rule->{iface}";
3108 }
c14dacdf
DM		 3109
3110 if ($rule->{type} ne 'group') {
dba740a9
DM		 3111 $raw .= " -source $rule->{source}" if $rule->{source};
3112 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3113 $raw .= " -p $rule->{proto}" if $rule->{proto};
3114 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3115 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3489f8a2 3116 $raw .= " -log $rule->{log}" if $rule->{log};
c14dacdf
DM		 3117 }
3118
cbb5d6f3 3119 $raw .= " # " . encode('utf8', $rule->{comment})
464f933e
DM		 3120 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3121 $raw .= "\n";
3122 } else {
c14dacdf 3123 die "unknown rule type '$rule->{type}'";
464f933e
DM		 3124 }
3125 }
3126
3127 return $raw;
3128};
3129
3130my $format_options = sub {
68c90e21
DM		 3131 my ($options) = @_;
3132
3133 my $raw = '';
464f933e
DM		 3134
3135 $raw .= "[OPTIONS]\n\n";
3136 foreach my $opt (keys %$options) {
3137 $raw .= "$opt: $options->{$opt}\n";
3138 }
3139 $raw .= "\n";
68c90e21
DM		 3140
3141 return $raw;
464f933e
DM		 3142};
3143
0d5f0a0f
DM		 3144my $format_aliases = sub {
3145 my ($aliases) = @_;
3146
3147 my $raw = '';
3148
3149 $raw .= "[ALIASES]\n\n";
3150 foreach my $k (keys %$aliases) {
81d574a7
DM		 3151 my $e = $aliases->{$k};
3152 $raw .= "$e->{name} $e->{cidr}";
3153 $raw .= " # " . encode('utf8', $e->{comment})
3154 if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3155 $raw .= "\n";
0d5f0a0f
DM		 3156 }
3157 $raw .= "\n";
3158
3159 return $raw;
3160};
3161
1210ae94
DM		 3162my $format_ipsets = sub {
3163 my ($fw_conf) = @_;
3164
9d6f90e6
DM		 3165 my $raw = '';
3166
1210ae94
DM		 3167 foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3168 if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3169 my $utf8comment = encode('utf8', $comment);
3170 $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3171 } else {
3172 $raw .= "[IPSET $ipset]\n\n";
3173 }
3174 my $options = $fw_conf->{ipset}->{$ipset};
6e299ae3 3175
1210ae94
DM		 3176 my $nethash = {};
3177 foreach my $entry (@$options) {
3178 $nethash->{$entry->{cidr}} = $entry;
3179 }
3180
3181 foreach my $cidr (sort keys %$nethash) {
3182 my $entry = $nethash->{$cidr};
3183 my $line = $entry->{nomatch} ? '!' : '';
3184 $line .= $entry->{cidr};
3185 $line .= " # " . encode('utf8', $entry->{comment})
3186 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3187 $raw .= "$line\n";
3188 }
3189
3190 $raw .= "\n";
9d6f90e6 3191 }
e34d0e58 3192
9d6f90e6
DM		 3193 return $raw;
3194};
3195
464f933e
DM		 3196sub save_vmfw_conf {
3197 my ($vmid, $vmfw_conf) = @_;
3198
3199 my $raw = '';
3200
3201 my $options = $vmfw_conf->{options};
89ea63c8 3202 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3203
e76a9f53 3204 my $aliases = $vmfw_conf->{aliases};
89ea63c8 3205 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e76a9f53 3206
89ea63c8 3207 $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
1210ae94 3208
8824b2f0 3209 my $rules = $vmfw_conf->{rules} || [];
89ea63c8 3210 if ($rules && scalar(@$rules)) {
464f933e
DM		 3211 $raw .= "[RULES]\n\n";
3212 $raw .= &$format_rules($rules, 1);
3213 $raw .= "\n";
3214 }
3215
21053409 3216 my $filename = "$pvefw_conf_dir/$vmid.fw";
c32e04e6
FG		 3217 if ($raw) {
3218 mkdir $pvefw_conf_dir;
3219 PVE::Tools::file_set_contents($filename, $raw);
3220 } else {
3221 unlink $filename;
3222 }
464f933e
DM		 3223}
3224
edee9035
AG		 3225sub remove_vmfw_conf {
3226 my ($vmid) = @_;
3227
3228 my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3229
3230 unlink $vmfw_conffile;
3231}
3232
5471ff7c
AG		 3233sub clone_vmfw_conf {
3234 my ($vmid, $newid) = @_;
3235
3236 my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3237 my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3238
3239 if (-f $clonevm_conffile) {
3240 unlink $clonevm_conffile;
3241 }
3242 if (-f $sourcevm_conffile) {
3243 my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3244 PVE::Tools::file_set_contents($clonevm_conffile, $data);
3245 }
3246}
3247
6fc63ffd 3248sub read_vm_firewall_configs {
40af93c4 3249 my ($cluster_conf, $vmdata, $dir) = @_;
8aef5177 3250
6fc63ffd 3251 my $vmfw_configs = {};
c8301d63 3252
b6b8e6ad 3253 foreach my $vmid (keys %{$vmdata->{qemu}}) {
40af93c4 3254 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
b6b8e6ad
DM		 3255 next if !$vmfw_conf->{options}; # skip if file does not exists
3256 $vmfw_configs->{$vmid} = $vmfw_conf;
3257 }
3b4882dc 3258 foreach my $vmid (keys %{$vmdata->{lxc}}) {
40af93c4 3259 my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3b4882dc
AG		 3260 next if !$vmfw_conf->{options}; # skip if file does not exists
3261 $vmfw_configs->{$vmid} = $vmfw_conf;
3262 }
5e1267a5 3263
6fc63ffd 3264 return $vmfw_configs;
5e1267a5
DM		 3265}
3266
2d404ffc
DM		 3267sub get_option_log_level {
3268 my ($options, $k) = @_;
3269
3270 my $v = $options->{$k};
178a63be 3271 $v = $default_log_level if !defined($v);
2d404ffc
DM		 3272
3273 return undef if $v eq '' || $v eq 'nolog';
3274
3489f8a2 3275 return $v if defined($log_level_hash->{$v});
2d404ffc
DM		 3276
3277 warn "unknown log level ($k = '$v')\n";
3278
3279 return undef;
3280}
3281
d8f2505e 3282sub generate_std_chains {
db8a955f
DM		 3283 my ($ruleset, $options, $ipversion) = @_;
3284
3285 my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
cbb5d6f3 3286
2d404ffc 3287 my $loglevel = get_option_log_level($options, 'smurf_log_level');
044409e5
TW		 3288 my $chain = 'PVEFW-smurflog';
3289 if ( $std_chains->{$chain} ) {
3290 foreach my $r (@{$std_chains->{$chain}}) {
3291 $r->{log} = $loglevel;
3292 }
db8a955f 3293 }
2d404ffc
DM		 3294
3295 # same as shorewall logflags action.
3296 $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
782c4cde 3297 $chain = 'PVEFW-logflags';
044409e5
TW		 3298 if ( $std_chains->{$chain} ) {
3299 foreach my $r (@{$std_chains->{$chain}}) {
3300 $r->{log} = $loglevel;
3301 }
3302 }
d8f2505e 3303
db8a955f 3304 foreach my $chain (keys %$std_chains) {
d8f2505e 3305 ruleset_create_chain($ruleset, $chain);
db8a955f 3306 foreach my $rule (@{$std_chains->{$chain}}) {
d8f2505e 3307 if (ref($rule)) {
3489f8a2 3308 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
d8f2505e 3309 } else {
044409e5 3310 die "rule $rule as string - should not happen";
d8f2505e
DM		 3311 }
3312 }
3313 }
3314}
3315
34cdedfa 3316sub generate_ipset_chains {
74601077 3317 my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
34cdedfa 3318
74601077 3319 foreach my $ipset (keys %{$ipsets}) {
34cdedfa 3320
74601077 3321 my $options = $ipsets->{$ipset};
34cdedfa 3322
ebf72e49
WB		 3323 if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3324 if (my $ips = $device_ips->{$1}) {
3325 $options = [@$options, @$ips];
3326 }
3327 }
3328
88c26d5e
DM		 3329 # remove duplicates
3330 my $nethash = {};
3331 foreach my $entry (@$options) {
3332 next if $entry->{errors}; # skip entries with errors
3333 eval {
3334 my ($cidr, $ver);
3335 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3336 ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3337 } else {
3338 ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3339 }
3340 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3341 if ($ver == 6) {
e0a9139f
WB		 3342 # ip_compress_address takes an address only, no CIDR
3343 my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3344 $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3345 $cidr .= $prefix_len if defined($prefix_len);
88c26d5e
DM		 3346 $cidr =~ s|/128$||;
3347 } else {
3348 $cidr =~ s|/32$||;
3349 }
34cdedfa 3350
88c26d5e
DM		 3351 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3352 };
3353 warn $@ if $@;
3354 }
6d959e3f 3355
88c26d5e
DM		 3356 foreach my $ipversion (4, 6) {
3357 my $data = $nethash->{$ipversion};
30f1b100 3358
88c26d5e 3359 my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
6d959e3f 3360
88c26d5e
DM		 3361 my $hashsize = scalar(@$options);
3362 if ($hashsize <= 64) {
3363 $hashsize = 64;
3364 } else {
3365 $hashsize = round_powerof2($hashsize);
3366 }
6d959e3f 3367
88c26d5e 3368 my $family = $ipversion == "6" ? "inet6" : "inet";
30f1b100 3369
88c26d5e 3370 $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
6d959e3f 3371
88c26d5e
DM		 3372 foreach my $cidr (sort keys %$data) {
3373 my $entry = $data->{$cidr};
6d959e3f 3374
88c26d5e
DM		 3375 my $cmd = "add $name $cidr";
3376 if ($entry->{nomatch}) {
3377 if ($feature_ipset_nomatch) {
3378 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3379 } else {
3380 warn "ignore !$cidr - nomatch not supported by kernel\n";
3381 }
6d959e3f 3382 } else {
88c26d5e 3383 push @{$ipset_ruleset->{$name}}, $cmd;
6d959e3f 3384 }
9d6f90e6 3385 }
9d6f90e6 3386 }
34cdedfa 3387 }
2a052ee3
AD		 3388}
3389
3390sub round_powerof2 {
dd7a13fd 3391 my ($int) = @_;
2a052ee3 3392
dd7a13fd
DM		 3393 $int--;
3394 $int |= $int >> $_ foreach (1,2,4,8,16);
3395 return ++$int;
34cdedfa
AD		 3396}
3397
cc37e000
TL		 3398my $set_global_log_ratelimit = sub {
3399 my $cluster_opts = shift;
3400
3401 $global_log_ratelimit = '--limit 1/sec';
3402 if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3403 my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3404 my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3405
3406 if ($limit->{enable}) {
3407 if (my $rate = $limit->{rate}) {
3408 $global_log_ratelimit = "--limit $rate";
3409 }
3410 if (my $burst = $limit->{burst}) {
3411 $global_log_ratelimit .= " --limit-burst $burst";
3412 }
3413 } else {
3414 $global_log_ratelimit = undef;
3415 }
3416 }
3417};
3418
fca39c2c 3419sub load_clusterfw_conf {
40af93c4 3420 my ($filename) = @_;
8aef5177
DM		 3421
3422 $filename = $clusterfw_conf_filename if !defined($filename);
585ede43
TL		 3423 my $empty_conf = {
3424 rules => [],
3425 options => {},
3426 aliases => {},
3427 groups => {},
3428 group_comments => {},
3429 ipset => {} ,
3430 ipset_comments => {},
3431 };
530c005e 3432
585ede43
TL		 3433 my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3434 $set_global_log_ratelimit->($cluster_conf->{options});
5e1267a5 3435
fca39c2c 3436 return $cluster_conf;
e5d76bde
DM		 3437}
3438
fca39c2c
DM		 3439sub save_clusterfw_conf {
3440 my ($cluster_conf) = @_;
9c7e0858
DM		 3441
3442 my $raw = '';
9c7e0858 3443
c6f5cc88 3444 my $options = $cluster_conf->{options};
89ea63c8 3445 $raw .= &$format_options($options) if $options && scalar(keys %$options);
9c7e0858 3446
0d5f0a0f 3447 my $aliases = $cluster_conf->{aliases};
89ea63c8 3448 $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
e34d0e58 3449
89ea63c8 3450 $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
1210ae94 3451
c6f5cc88 3452 my $rules = $cluster_conf->{rules};
89ea63c8 3453 if ($rules && scalar(@$rules)) {
c6f5cc88 3454 $raw .= "[RULES]\n\n";
63c91681 3455 $raw .= &$format_rules($rules, 1);
c6f5cc88
DM		 3456 $raw .= "\n";
3457 }
3458
89ea63c8
DM		 3459 if ($cluster_conf->{groups}) {
3460 foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3461 my $rules = $cluster_conf->{groups}->{$group};
3462 if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3463 my $utf8comment = encode('utf8', $comment);
3464 $raw .= "[group $group] # $utf8comment\n\n";
3465 } else {
3466 $raw .= "[group $group]\n\n";
3467 }
0d22acb3 3468
89ea63c8
DM		 3469 $raw .= &$format_rules($rules, 0);
3470 $raw .= "\n";
3471 }
9c7e0858
DM		 3472 }
3473
c32e04e6
FG		 3474 if ($raw) {
3475 mkdir $pvefw_conf_dir;
3476 PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3477 } else {
3478 unlink $clusterfw_conf_filename;
3479 }
9c7e0858
DM		 3480}
3481
8b27beb9 3482sub load_hostfw_conf {
40af93c4 3483 my ($cluster_conf, $filename) = @_;
8aef5177
DM		 3484
3485 $filename = $hostfw_conf_filename if !defined($filename);
8b27beb9 3486
585ede43
TL		 3487 my $empty_conf = { rules => [], options => {}};
3488 return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
8b27beb9
DM		 3489}
3490
63c91681
DM		 3491sub save_hostfw_conf {
3492 my ($hostfw_conf) = @_;
3493
3494 my $raw = '';
3495
3496 my $options = $hostfw_conf->{options};
89ea63c8 3497 $raw .= &$format_options($options) if $options && scalar(keys %$options);
cbb5d6f3 3498
63c91681 3499 my $rules = $hostfw_conf->{rules};
89ea63c8 3500 if ($rules && scalar(@$rules)) {
63c91681
DM		 3501 $raw .= "[RULES]\n\n";
3502 $raw .= &$format_rules($rules, 1);
3503 $raw .= "\n";
3504 }
3505
c32e04e6
FG		 3506 if ($raw) {
3507 PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3508 } else {
3509 unlink $hostfw_conf_filename;
3510 }
63c91681
DM		 3511}
3512
e5d76bde 3513sub compile {
06208a01 3514 my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3dfa8a7f 3515
8aef5177
DM		 3516 my $vmfw_configs;
3517
cfd7cd9c
TW		 3518 # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3519 $pve_std_chains = dclone($pve_std_chains_conf);
3520
8aef5177
DM		 3521 if ($vmdata) { # test mode
3522 my $testdir = $vmdata->{testdir} || die "no test directory specified";
3523 my $filename = "$testdir/cluster.fw";
40af93c4 3524 $cluster_conf = load_clusterfw_conf($filename);
8aef5177
DM		 3525
3526 $filename = "$testdir/host.fw";
40af93c4 3527 $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
8aef5177 3528
40af93c4 3529 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
8aef5177 3530 } else { # normal operation
40af93c4 3531 $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
8aef5177 3532
40af93c4 3533 $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
8aef5177 3534
06208a01 3535 # cfs_update is handled by daemon or API
328d1e87
SR		 3536 $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3537 if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
06208a01 3538
8aef5177 3539 $vmdata = read_local_vm_config();
40af93c4 3540 $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
8aef5177 3541 }
3dfa8a7f 3542
84025e99 3543 return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
9268573a 3544
525778d7
DM		 3545 my $localnet;
3546 if ($cluster_conf->{aliases}->{local_network}) {
3547 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3548 } else {
afcd29b3
DM		 3549 my $localnet_ver;
3550 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3551
84025e99 3552 $cluster_conf->{aliases}->{local_network} = {
afcd29b3 3553 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
525778d7
DM		 3554 }
3555
3556 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
bfc488f6 3557
64e0adf4
AD		 3558 my $ruleset = {};
3559 my $rulesetv6 = {};
3560 $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3561 $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3562 $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3563 $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
40af93c4 3564 my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
147dd882
WB		 3565 my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3566
c5e8b008 3567 return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
147dd882
WB		 3568}
3569
64e0adf4
AD		 3570sub compile_iptables_raw {
3571 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3572
3573 my $ruleset = {};
3574
3575 return $ruleset;
3576}
3577
147dd882 3578sub compile_iptables_filter {
06208a01 3579 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
085fd492 3580
3fa83edf
DM		 3581 my $ruleset = {};
3582
dec84fcd
DM		 3583 ruleset_create_chain($ruleset, "PVEFW-INPUT");
3584 ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
5b1df9a0 3585
fadb13dd 3586 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
e34d0e58 3587
8b27beb9 3588 my $hostfw_options = $hostfw_conf->{options} || {};
fadb13dd 3589
88733a74
AD		 3590 # fixme: what log level should we use here?
3591 my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3592
b409c8a8
TL		 3593 my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3594 ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
88733a74 3595
e2943485 3596 ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
88c26d5e 3597 ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
e2943485 3598
1e9c5070 3599 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
e2943485
DM		 3600
3601 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
1e9c5070 3602 ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
e2943485 3603
db8a955f 3604 generate_std_chains($ruleset, $hostfw_options, $ipversion);
fadb13dd 3605
6d2ab017 3606 my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2d404ffc 3607
35d1d6da 3608 if ($hostfw_enable) {
06208a01 3609 eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
1a9978ed
DM		 3610 warn $@ if $@; # just to be sure - should not happen
3611 }
3fa83edf 3612
6158271d 3613 # generate firewall rules for QEMU VMs
0a0ba19e 3614 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
1a9978ed
DM		 3615 eval {
3616 my $conf = $vmdata->{qemu}->{$vmid};
3617 my $vmfw_conf = $vmfw_configs->{$vmid};
bd60a824 3618 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
1a9978ed 3619
0a0ba19e 3620 foreach my $netid (sort keys %$conf) {
1a9978ed
DM		 3621 next if $netid !~ m/^net(\d+)$/;
3622 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3623 next if !$net->{firewall};
1a9978ed 3624
ad722fb4 3625 my $iface = "tap${vmid}i$1";
1a9978ed
DM		 3626 my $macaddr = $net->{macaddr};
3627 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
ad722fb4 3628 $vmfw_conf, $vmid, 'IN', $ipversion);
1a9978ed 3629 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
ad722fb4 3630 $vmfw_conf, $vmid, 'OUT', $ipversion);
1a9978ed
DM		 3631 }
3632 };
3633 warn $@ if $@; # just to be sure - should not happen
3fa83edf 3634 }
c8301d63 3635
3b4882dc 3636 # generate firewall rules for LXC containers
0a0ba19e 3637 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
ad722fb4
FG		 3638 eval {
3639 my $conf = $vmdata->{lxc}->{$vmid};
3640 my $vmfw_conf = $vmfw_configs->{$vmid};
3641 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3642
3643 foreach my $netid (sort keys %$conf) {
3644 next if $netid !~ m/^net(\d+)$/;
3645 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3646 next if !$net->{firewall};
3647
3648 my $iface = "veth${vmid}i$1";
3649 my $macaddr = $net->{hwaddr};
3650 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3651 $vmfw_conf, $vmid, 'IN', $ipversion);
3652 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3653 $vmfw_conf, $vmid, 'OUT', $ipversion);
3654 }
3655 };
3656 warn $@ if $@; # just to be sure - should not happen
3b4882dc
AG		 3657 }
3658
ad722fb4 3659 if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
1e9c5070 3660 ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
097820b0
AD		 3661 }
3662
147dd882
WB		 3663 return $ruleset;
3664}
3665
ebf72e49
WB		 3666sub mac_to_linklocal {
3667 my ($macaddr) = @_;
3668 my @parts = split(/:/, $macaddr);
3669 # The standard link local address uses the fe80::/64 prefix with the
3670 # modified EUI-64 identifier derived from the MAC address by flipping the
3671 # universal/local bit and inserting FF:FE in the middle.
3672 # See RFC 4291.
3673 $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3674 my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3675 return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3676}
3677
147dd882
WB		 3678sub compile_ipsets {
3679 my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3680
3681 my $localnet;
3682 if ($cluster_conf->{aliases}->{local_network}) {
3683 $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3684 } else {
3685 my $localnet_ver;
3686 ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3687
3688 $cluster_conf->{aliases}->{local_network} = {
3689 name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3690 }
3691
3692 push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3693
3694
3695 my $ipset_ruleset = {};
3696
3697 # generate ipsets for QEMU VMs
3698 foreach my $vmid (keys %{$vmdata->{qemu}}) {
3699 eval {
3700 my $conf = $vmdata->{qemu}->{$vmid};
3701 my $vmfw_conf = $vmfw_configs->{$vmid};
3702 return if !$vmfw_conf;
3703
74601077
WB		 3704 # When the 'ipfilter' option is enabled every device for which there
3705 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3706 # ipset.
3707 # The reason is that ipfilter ipsets are always filled with standard
3708 # IPv6 link-local filters.
3709 my $ipsets = $vmfw_conf->{ipset};
3710 my $implicit_sets = {};
3711
ebf72e49
WB		 3712 my $device_ips = {};
3713 foreach my $netid (keys %$conf) {
3714 next if $netid !~ m/^net(\d+)$/;
3715 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3716 next if !$net->{firewall};
3717
74601077
WB		 3718 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3719 $implicit_sets->{"ipfilter-$netid"} = [];
3720 }
3721
ebf72e49
WB		 3722 my $macaddr = $net->{macaddr};
3723 my $linklocal = mac_to_linklocal($macaddr);
3724 $device_ips->{$netid} = [
3725 { cidr => $linklocal },
3726 { cidr => 'fe80::/10', nomatch => 1 }
3727 ];
3728 }
3729
74601077
WB		 3730 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3731 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
147dd882
WB		 3732 };
3733 warn $@ if $@; # just to be sure - should not happen
3734 }
3735
3736 # generate firewall rules for LXC containers
3737 foreach my $vmid (keys %{$vmdata->{lxc}}) {
aa229652
WB		 3738 eval {
3739 my $conf = $vmdata->{lxc}->{$vmid};
3740 my $vmfw_conf = $vmfw_configs->{$vmid};
3741 return if !$vmfw_conf;
147dd882 3742
74601077
WB		 3743 # When the 'ipfilter' option is enabled every device for which there
3744 # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3745 # ipset.
3746 # The reason is that ipfilter ipsets are always filled with standard
383fe679
WB		 3747 # IPv6 link-local filters, as well as the IP addresses configured
3748 # for the container.
74601077
WB		 3749 my $ipsets = $vmfw_conf->{ipset};
3750 my $implicit_sets = {};
3751
ebf72e49
WB		 3752 my $device_ips = {};
3753 foreach my $netid (keys %$conf) {
3754 next if $netid !~ m/^net(\d+)$/;
a7c85d56 3755 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
ebf72e49
WB		 3756 next if !$net->{firewall};
3757
74601077
WB		 3758 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3759 $implicit_sets->{"ipfilter-$netid"} = [];
3760 }
3761
ebf72e49
WB		 3762 my $macaddr = $net->{hwaddr};
3763 my $linklocal = mac_to_linklocal($macaddr);
383fe679 3764 my $set = $device_ips->{$netid} = [
ebf72e49
WB		 3765 { cidr => $linklocal },
3766 { cidr => 'fe80::/10', nomatch => 1 }
3767 ];
37ef1ce1 3768 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
383fe679
WB		 3769 push @$set, { cidr => $1 };
3770 }
37ef1ce1 3771 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
383fe679
WB		 3772 push @$set, { cidr => $1 };
3773 }
ebf72e49
WB		 3774 }
3775
74601077
WB		 3776 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3777 generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
aa229652
WB		 3778 };
3779 warn $@ if $@; # just to be sure - should not happen
147dd882
WB		 3780 }
3781
74601077 3782 generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
27083984 3783
147dd882 3784 return $ipset_ruleset;
3fa83edf
DM		 3785}
3786
c5e8b008 3787sub compile_ebtables_filter {
40af93c4 3788 my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
c5e8b008 3789
2549e7ef 3790 if (!($cluster_conf->{options}->{ebtables} // 1)) {
84025e99
SI		 3791 return {};
3792 }
c5e8b008
AD		 3793
3794 my $ruleset = {};
3795
3796 ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3797
c5e8b008
AD		 3798 ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3799 #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3800 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3801 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3802 ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3803
3804 # generate firewall rules for QEMU VMs
2e30c5c7 3805 foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
c5e8b008
AD		 3806 eval {
3807 my $conf = $vmdata->{qemu}->{$vmid};
3808 my $vmfw_conf = $vmfw_configs->{$vmid};
3809 return if !$vmfw_conf;
401c141b 3810 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3811
4a1072dd 3812 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3813 next if $netid !~ m/^net(\d+)$/;
3814 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3815 next if !$net->{firewall};
3816 my $iface = "tap${vmid}i$1";
3817 my $macaddr = $net->{macaddr};
401c141b
AD		 3818 my $arpfilter = [];
3819 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3820 foreach my $ipaddr (@$ipset) {
3821 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3822 next if !$ip || ($version && $version != 4);
3823 push(@$arpfilter, $ip);
3824 }
3825 }
3826 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3827 }
3828 };
3829 warn $@ if $@; # just to be sure - should not happen
3830 }
3831
3832 # generate firewall rules for LXC containers
2e30c5c7 3833 foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
c5e8b008
AD		 3834 eval {
3835 my $conf = $vmdata->{lxc}->{$vmid};
3836
3837 my $vmfw_conf = $vmfw_configs->{$vmid};
3838 return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
401c141b 3839 my $ipsets = $vmfw_conf->{ipset};
c5e8b008 3840
4a1072dd 3841 foreach my $netid (sort keys %$conf) {
c5e8b008
AD		 3842 next if $netid !~ m/^net(\d+)$/;
3843 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3844 next if !$net->{firewall};
3845 my $iface = "veth${vmid}i$1";
3846 my $macaddr = $net->{hwaddr};
401c141b
AD		 3847 my $arpfilter = [];
3848 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3849 foreach my $ipaddr (@$ipset) {
3850 my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3851 next if !$ip || ($version && $version != 4);
3852 push(@$arpfilter, $ip);
3853 }
3854 }
03984808 3855 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
a9068b2d
TL		 3856 # ebtables changes this to a .0/MASK network but we just
3857 # want the address here, no network - see #2193
255698f6
TL		 3858 $ip =~ s|/(\d+)$||;
3859 push @$arpfilter, $ip;
556ae5c1 3860 }
401c141b 3861 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
c5e8b008
AD		 3862 }
3863 };
3864 warn $@ if $@; # just to be sure - should not happen
3865 }
3866
3867 return $ruleset;
3868}
3869
3870sub generate_tap_layer2filter {
401c141b 3871 my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
c5e8b008
AD		 3872 my $options = $vmfw_conf->{options};
3873
3874 my $tapchain = $iface."-OUT";
3875
3876 # ebtables remove zeros from mac pairs
3877 $macaddr =~ s/0([0-9a-f])/$1/ig;
3878 $macaddr = lc($macaddr);
3879
3880 ruleset_create_chain($ruleset, $tapchain);
3881
3882 if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3883 ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3884 }
3885
401c141b
AD		 3886 if (@$arpfilter){
3887 my $arpchain = $tapchain."-ARP";
3888 ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3889 ruleset_create_chain($ruleset, $arpchain);
3890
3891 foreach my $ip (@{$arpfilter}) {
3892 ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3893 }
3894 ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3895 }
3896
c5e8b008 3897 if (defined($options->{layer2_protocols})){
33efd363
AD		 3898 my $protochain = $tapchain."-PROTO";
3899 ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3900 ruleset_create_chain($ruleset, $protochain);
3901
c5e8b008 3902 foreach my $proto (split(/,/, $options->{layer2_protocols})) {
33efd363 3903 ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
c5e8b008 3904 }
33efd363 3905 ruleset_addrule($ruleset, $protochain, '', '-j DROP');
c5e8b008
AD		 3906 }
3907
33efd363
AD		 3908 ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3909
c5e8b008
AD		 3910 ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3911}
3912
84025e99
SI		 3913# the parameter $change_only_regex changes two things if defined:
3914# * all chains not matching it will be left intact
3915# * both the $active_chains hash and the returned status_hash have different
3916# structure (they contain a key named 'rules').
3fa83edf 3917sub get_ruleset_status {
40af93c4 3918 my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3fa83edf
DM		 3919
3920 my $statushash = {};
3921
3922 foreach my $chain (sort keys %$ruleset) {
84025e99
SI		 3923 my $rules = $ruleset->{$chain};
3924 my $sig = &$digest_fn($rules);
3925 my $oldsig;
9bf7d929 3926
3fa83edf 3927 $statushash->{$chain}->{sig} = $sig;
84025e99
SI		 3928 if (defined($change_only_regex)) {
3929 $oldsig = $active_chains->{$chain}->{sig};
3930 $statushash->{$chain}->{rules} = $rules;
3931 } else {
3932 $oldsig = $active_chains->{$chain};
3933 }
3fa83edf
DM		 3934 if (!defined($oldsig)) {
3935 $statushash->{$chain}->{action} = 'create';
3936 } else {
3937 if ($oldsig eq $sig) {
3938 $statushash->{$chain}->{action} = 'exists';
3939 } else {
3940 $statushash->{$chain}->{action} = 'update';
3941 }
3942 }
84025e99
SI		 3943 if ($verbose) {
3944 print "$statushash->{$chain}->{action} $chain ($sig)\n";
3945 foreach my $cmd (@{$rules}) {
3946 print "\t$cmd\n";
3947 }
3fa83edf
DM		 3948 }
3949 }
3950
3951 foreach my $chain (sort keys %$active_chains) {
84025e99
SI		 3952 next if defined($ruleset->{$chain});
3953 my $action = 'delete';
d9551052 3954 my $sig = $active_chains->{$chain};
84025e99
SI		 3955 if (defined($change_only_regex)) {
3956 $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3957 $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
d9551052 3958 $sig = $sig->{sig};
84025e99 3959 }
84025e99
SI		 3960 $statushash->{$chain}->{action} = $action;
3961 $statushash->{$chain}->{sig} = $sig;
3962 print "$action $chain ($sig)\n" if $verbose;
6158271d 3963 }
2a052ee3 3964
3fa83edf
DM		 3965 return $statushash;
3966}
3967
3fa83edf
DM		 3968sub print_sig_rule {
3969 my ($chain, $sig) = @_;
3970
09d5f68e
DM		 3971 # We just use this to store a SHA1 checksum used to detect changes
3972 return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
b6360c3f
DM		 3973}
3974
df7cb349 3975sub get_ruleset_cmdlist {
64e0adf4 3976 my ($ruleset, $iptablescmd, $table) = @_;
3fa83edf 3977
64e0adf4 3978 $table = 'filter' if !$table;
cbb5d6f3 3979
64e0adf4
AD		 3980 my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
3981
3982 my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
40af93c4 3983 my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 3984
3985 # create missing chains first
3986 foreach my $chain (sort keys %$ruleset) {
3987 my $stat = $statushash->{$chain};
3988 die "internal error" if !$stat;
3989 next if $stat->{action} ne 'create';
886aba9c 3990
3fa83edf
DM		 3991 $cmdlist .= ":$chain - [0:0]\n";
3992 }
3993
64e0adf4 3994 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
55fad3b7
DM		 3995 my $chain = "PVEFW-$h";
3996 if ($ruleset->{$chain} && !$hooks->{$h}) {
3997 $cmdlist .= "-A $h -j $chain\n";
4bd0a9c4 3998 }
3fa83edf
DM		 3999 }
4000
4001 foreach my $chain (sort keys %$ruleset) {
4002 my $stat = $statushash->{$chain};
4003 die "internal error" if !$stat;
4004
4005 if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4006 $cmdlist .= "-F $chain\n";
4007 foreach my $cmd (@{$ruleset->{$chain}}) {
4008 $cmdlist .= "$cmd\n";
4009 }
4010 $cmdlist .= print_sig_rule($chain, $stat->{sig});
4011 } elsif ($stat->{action} eq 'delete') {
f5d28682 4012 die "internal error"; # this should not happen
3fa83edf
DM		 4013 } elsif ($stat->{action} eq 'exists') {
4014 # do nothing
4015 } else {
4016 die "internal error - unknown status '$stat->{action}'";
4017 }
4018 }
4019
f5d28682
DM		 4020 foreach my $chain (keys %$statushash) {
4021 next if $statushash->{$chain}->{action} ne 'delete';
4022 $cmdlist .= "-F $chain\n";
4023 }
4024 foreach my $chain (keys %$statushash) {
4025 next if $statushash->{$chain}->{action} ne 'delete';
fadb13dd
DM		 4026 next if $chain eq 'PVEFW-INPUT';
4027 next if $chain eq 'PVEFW-OUTPUT';
4028 next if $chain eq 'PVEFW-FORWARD';
64e0adf4 4029 next if $chain eq 'PVEFW-PREROUTING';
f5d28682
DM		 4030 $cmdlist .= "-X $chain\n";
4031 }
4032
64e0adf4 4033 my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4bd0a9c4 4034
3fa83edf
DM		 4035 $cmdlist .= "COMMIT\n";
4036
3f95d14a 4037 return wantarray ? ($cmdlist, $changes) : $cmdlist;
6b9f68a2
DM		 4038}
4039
d4a23c88 4040my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
84025e99 4041
151c209e 4042sub get_ebtables_cmdlist {
40af93c4 4043 my ($ruleset) = @_;
151c209e
AD		 4044
4045 my $changes = 0;
4046 my $cmdlist = "*filter\n";
4047
84025e99
SI		 4048 my $active_chains = ebtables_get_chains();
4049 my $statushash = get_ruleset_status($ruleset, $active_chains,
40af93c4 4050 \&iptables_chain_digest,
84025e99 4051 $pve_ebtables_chainname_regex);
151c209e 4052
84025e99
SI		 4053 # create chains first and make sure PVE rules are evaluated if active
4054 my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4055 my $pve_include = 0;
4056 foreach my $chain (sort keys %$statushash) {
4057 next if ($statushash->{$chain}->{action} eq 'delete');
151c209e 4058 $cmdlist .= ":$chain ACCEPT\n";
84025e99 4059 $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
151c209e
AD		 4060 }
4061
84025e99 4062 foreach my $chain (sort keys %$statushash) {
151c209e 4063 my $stat = $statushash->{$chain};
84025e99 4064 $changes = 1 if ($stat->{action} !~ 'ignore|exists');
defdf28e 4065 next if ($stat->{action} eq 'delete');
151c209e 4066
84025e99
SI		 4067 foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4068 if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4069 next if ! $pve_include;
4070 $pve_include = 0;
4071 }
151c209e
AD		 4072 $cmdlist .= "$cmd\n";
4073 }
4074 }
84025e99 4075 $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
151c209e
AD		 4076
4077 return wantarray ? ($cmdlist, $changes) : $cmdlist;
4078}
4079
34cdedfa 4080sub get_ipset_cmdlist {
40af93c4 4081 my ($ruleset) = @_;
34cdedfa
AD		 4082
4083 my $cmdlist = "";
4084
dd7a13fd
DM		 4085 my $delete_cmdlist = "";
4086
4bd0a9c4 4087 my $active_chains = ipset_get_chains();
40af93c4 4088 my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
34cdedfa 4089
e34d0e58 4090 # remove stale _swap chains
30f1b100
DM		 4091 foreach my $chain (keys %$active_chains) {
4092 if ($chain =~ m/^PVEFW-\S+_swap$/) {
4093 $cmdlist .= "destroy $chain\n";
4094 }
4095 }
4096
c69cf614 4097 foreach my $chain (keys %$ruleset) {
c69cf614
DM		 4098 my $stat = $statushash->{$chain};
4099 die "internal error" if !$stat;
4100
4101 if ($stat->{action} eq 'create') {
4102 foreach my $cmd (@{$ruleset->{$chain}}) {
4103 $cmdlist .= "$cmd\n";
4104 }
4105 }
4106 }
4107
4108 foreach my $chain (keys %$ruleset) {
6d959e3f
DM		 4109 my $stat = $statushash->{$chain};
4110 die "internal error" if !$stat;
34cdedfa 4111
dd7a13fd
DM		 4112 if ($stat->{action} eq 'update') {
4113 my $chain_swap = $chain."_swap";
cbb5d6f3 4114
dd7a13fd
DM		 4115 foreach my $cmd (@{$ruleset->{$chain}}) {
4116 $cmd =~ s/$chain/$chain_swap/;
4117 $cmdlist .= "$cmd\n";
34cdedfa 4118 }
dd7a13fd
DM		 4119 $cmdlist .= "swap $chain_swap $chain\n";
4120 $cmdlist .= "flush $chain_swap\n";
4121 $cmdlist .= "destroy $chain_swap\n";
2a052ee3 4122 }
dd7a13fd 4123 }
3f95d14a 4124
88c26d5e 4125 # the remove unused chains
c69cf614 4126 foreach my $chain (keys %$statushash) {
dd7a13fd 4127 next if $statushash->{$chain}->{action} ne 'delete';
2a052ee3 4128
dd7a13fd
DM		 4129 $delete_cmdlist .= "flush $chain\n";
4130 $delete_cmdlist .= "destroy $chain\n";
34cdedfa
AD		 4131 }
4132
dd7a13fd 4133 my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
cbb5d6f3 4134
dd7a13fd 4135 return ($cmdlist, $delete_cmdlist, $changes);
34cdedfa
AD		 4136}
4137
6b9f68a2 4138sub apply_ruleset {
40af93c4 4139 my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
6b9f68a2
DM		 4140
4141 enable_bridge_firewall();
4142
cbb5d6f3 4143 my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
40af93c4 4144 get_ipset_cmdlist($ipset_ruleset);
6b9f68a2 4145
64e0adf4
AD		 4146 my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4147 my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
40af93c4 4148 my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
64e0adf4
AD		 4149 my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4150 my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
2a052ee3 4151
81a0bf43
DM		 4152 if ($verbose) {
4153 if ($ipset_changes) {
4154 print "ipset changes:\n";
4155 print $ipset_create_cmdlist if $ipset_create_cmdlist;
4156 print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4157 }
3f95d14a 4158
81a0bf43
DM		 4159 if ($changes) {
4160 print "iptables changes:\n";
4161 print $cmdlist;
4162 }
17da5c0f
AD		 4163
4164 if ($changesv6) {
4165 print "ip6tables changes:\n";
4166 print $cmdlistv6;
4167 }
151c209e 4168
64e0adf4
AD		 4169 if ($changes_raw) {
4170 print "iptables table raw changes:\n";
4171 print $cmdlist_raw;
4172 }
4173
4174 if ($changesv6_raw) {
4175 print "ip6tables table raw changes:\n";
4176 print $cmdlistv6_raw;
4177 }
4178
151c209e
AD		 4179 if ($ebtables_changes) {
4180 print "ebtables changes:\n";
4181 print $ebtables_cmdlist;
4182 }
81a0bf43 4183 }
3fa83edf 4184
259db1e6
DM		 4185 my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4186 PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4187
2a052ee3 4188 ipset_restore_cmdlist($ipset_create_cmdlist);
34cdedfa 4189
259db1e6
DM		 4190 $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4191 PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4192
3fa83edf 4193 iptables_restore_cmdlist($cmdlist);
259db1e6 4194
64e0adf4
AD		 4195 $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4196 PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4197
4198 iptables_restore_cmdlist($cmdlist_raw, 'raw');
4199
259db1e6
DM		 4200 $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4201 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4202
17da5c0f 4203 ip6tables_restore_cmdlist($cmdlistv6);
3fa83edf 4204
64e0adf4
AD		 4205 $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4206 PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4207
4208 ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4209
259db1e6
DM		 4210 $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4211 PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4212
dd7a13fd 4213 ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2a052ee3 4214
151c209e
AD		 4215 ebtables_restore_cmdlist($ebtables_cmdlist);
4216
4217 $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4218 PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4219
6158271d 4220 # test: re-read status and check if everything is up to date
64e0adf4 4221 my $ruleset_filter = $ruleset->{filter};
4bd0a9c4 4222 my $active_chains = iptables_get_chains();
64e0adf4 4223 my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
3fa83edf
DM		 4224
4225 my $errors;
64e0adf4 4226 foreach my $chain (sort keys %$ruleset_filter) {
3fa83edf
DM		 4227 my $stat = $statushash->{$chain};
4228 if ($stat->{action} ne 'exists') {
4229 warn "unable to update chain '$chain'\n";
4230 $errors = 1;
4231 }
4232 }
b6360c3f 4233
64e0adf4 4234 my $rulesetv6_filter = $rulesetv6->{filter};
17da5c0f 4235 my $active_chainsv6 = iptables_get_chains("ip6tables");
64e0adf4 4236 my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
17da5c0f 4237
64e0adf4 4238 foreach my $chain (sort keys %$rulesetv6_filter) {
17da5c0f
AD		 4239 my $stat = $statushashv6->{$chain};
4240 if ($stat->{action} ne 'exists') {
4241 warn "unable to update chain '$chain'\n";
4242 $errors = 1;
4243 }
4244 }
4245
64e0adf4
AD		 4246 my $ruleset_raw = $ruleset->{raw};
4247 my $active_chains_raw = iptables_get_chains(undef, 'raw');
4248 my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4249
4250 foreach my $chain (sort keys %$ruleset_raw) {
4251 my $stat = $statushash_raw->{$chain};
4252 if ($stat->{action} ne 'exists') {
4253 warn "unable to update chain '$chain'\n";
4254 $errors = 1;
4255 }
4256 }
4257
4258 my $rulesetv6_raw = $rulesetv6->{raw};
4259 my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4260 my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4261
4262 foreach my $chain (sort keys %$rulesetv6_raw) {
4263 my $stat = $statushashv6_raw->{$chain};
4264 if ($stat->{action} ne 'exists') {
4265 warn "unable to update chain '$chain'\n";
4266 $errors = 1;
4267 }
4268 }
4269
151c209e 4270 my $active_ebtables_chains = ebtables_get_chains();
84025e99
SI		 4271 my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4272 $active_ebtables_chains, \&iptables_chain_digest,
40af93c4 4273 $pve_ebtables_chainname_regex);
151c209e
AD		 4274
4275 foreach my $chain (sort keys %$ebtables_ruleset) {
4276 my $stat = $ebtables_statushash->{$chain};
4277 if ($stat->{action} ne 'exists') {
4278 warn "ebtables : unable to update chain '$chain'\n";
4279 $errors = 1;
4280 }
4281 }
4282
3fa83edf 4283 die "unable to apply firewall changes\n" if $errors;
46a2ac1f
AD		 4284
4285 update_nf_conntrack_max($hostfw_conf);
4286
4287 update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4288
6c27f4f3 4289 update_nf_conntrack_logging($hostfw_conf);
b6360c3f
DM		 4290}
4291
490cdead
DM		 4292sub update_nf_conntrack_max {
4293 my ($hostfw_conf) = @_;
4294
b2ec31cc 4295 my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
490cdead
DM		 4296
4297 my $options = $hostfw_conf->{options} || {};
4298
4299 if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4300 $max = $options->{nf_conntrack_max};
4301 $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4302 }
4303
4304 my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4305 my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4306
4307 my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4308
4309 if ($current != $max) {
4310 my $hashsize = int($max/4);
4311 PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4312 PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4313 }
4314}
4315
28c082a1
AD		 4316sub update_nf_conntrack_tcp_timeout_established {
4317 my ($hostfw_conf) = @_;
4318
4319 my $options = $hostfw_conf->{options} || {};
4320
4321 my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4322
4323 PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4324}
4325
6c27f4f3
DL		 4326my $log_nf_conntrack_enabled = undef;
4327sub update_nf_conntrack_logging {
4328 my ($hostfw_conf) = @_;
4329
4330 my $options = $hostfw_conf->{options} || {};
4331 my $value = $options->{log_nf_conntrack} || 0;
4332 if (!defined($log_nf_conntrack_enabled)
4333 || $value != $log_nf_conntrack_enabled)
4334 {
4335 my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4336 PVE::Tools::file_set_contents($tmpfile, $value);
4337
c1031ab1 4338 run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
6c27f4f3
DL		 4339 $log_nf_conntrack_enabled = $value;
4340 }
4341}
4342
c4a2e5ae
DM		 4343sub remove_pvefw_chains {
4344
7b7b2654
AD		 4345 PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4346 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
64e0adf4
AD		 4347 PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4348 PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
7b7b2654 4349 PVE::Firewall::remove_pvefw_chains_ipset();
0e8af63d 4350 PVE::Firewall::remove_pvefw_chains_ebtables();
7b7b2654
AD		 4351
4352}
4353
4354sub remove_pvefw_chains_iptables {
64e0adf4 4355 my ($iptablescmd, $table) = @_;
7b7b2654 4356
64e0adf4
AD		 4357 $table = 'filter' if !$table;
4358
4359 my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4360 my $cmdlist = "*$table\n";
c4a2e5ae 4361
64e0adf4 4362 foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
c4a2e5ae
DM		 4363 if ($hooks->{$h}) {
4364 $cmdlist .= "-D $h -j PVEFW-$h\n";
4365 }
4366 }
cbb5d6f3 4367
c4a2e5ae
DM		 4368 foreach my $chain (keys %$chash) {
4369 $cmdlist .= "-F $chain\n";
4370 }
4371
4372 foreach my $chain (keys %$chash) {
4373 $cmdlist .= "-X $chain\n";
4374 }
4375 $cmdlist .= "COMMIT\n";
4376
7b7b2654 4377 if($iptablescmd eq "ip6tables") {
64e0adf4 4378 ip6tables_restore_cmdlist($cmdlist, $table);
7b7b2654 4379 } else {
64e0adf4 4380 iptables_restore_cmdlist($cmdlist, $table);
7b7b2654
AD		 4381 }
4382}
4383
4384sub remove_pvefw_chains_ipset {
55fad3b7
DM		 4385
4386 my $ipset_chains = ipset_get_chains();
4387
7b7b2654 4388 my $cmdlist = "";
55fad3b7
DM		 4389
4390 foreach my $chain (keys %$ipset_chains) {
88c26d5e
DM		 4391 $cmdlist .= "flush $chain\n";
4392 $cmdlist .= "destroy $chain\n";
55fad3b7
DM		 4393 }
4394
7b7b2654 4395 ipset_restore_cmdlist($cmdlist) if $cmdlist;
c4a2e5ae
DM		 4396}
4397
0e8af63d
FG		 4398sub remove_pvefw_chains_ebtables {
4399 # apply empty ruleset = remove all our chains
4400 ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4401}
4402
8b453a09
DM		 4403sub init {
4404 my $cluster_conf = load_clusterfw_conf();
4405 my $cluster_options = $cluster_conf->{options};
4406 my $enable = $cluster_options->{enable};
4407
4408 return if !$enable;
4409
4410 # load required modules here
4411}
4412
6b9f68a2 4413sub update {
6b9f68a2 4414 my $code = sub {
3dfa8a7f
DM		 4415
4416 my $cluster_conf = load_clusterfw_conf();
4417 my $cluster_options = $cluster_conf->{options};
4418
55fad3b7 4419 if (!$cluster_options->{enable}) {
b22130d3 4420 PVE::Firewall::remove_pvefw_chains();
3dfa8a7f
DM		 4421 return;
4422 }
4423
50f9a28d 4424 my $hostfw_conf = load_hostfw_conf($cluster_conf);
3dfa8a7f 4425
c5e8b008 4426 my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
490cdead 4427
151c209e 4428 apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
6b9f68a2
DM		 4429 };
4430
4431 run_locked($code);
4432}
4433
b6360c3f 44341;
Firewall test scripts